diff --git a/Cargo.lock b/Cargo.lock
index f8d2213d..9294ee14 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -10,10 +10,11 @@ checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
 
 [[package]]
 name = "ahash"
-version = "0.7.6"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
+checksum = "57e6e951cfbb2db8de1828d49073a113a29fd7117b1596caa781a258c7e38d72"
 dependencies = [
+ "cfg-if",
  "getrandom",
  "once_cell",
  "version_check",
@@ -667,9 +668,9 @@ dependencies = [
 
 [[package]]
 name = "quick-xml"
-version = "0.23.1"
+version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11bafc859c6815fbaffbbbf4229ecb767ac913fecb27f9ad4343662e9ef099ea"
+checksum = "7f50b1c63b38611e7d4d7f68b82d3ad0cc71a2ad2e7f61fc10f1328d917c93cd"
 dependencies = [
  "memchr",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 6176ff96..d0747d38 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ multithreaded = ["dashmap", "crossbeam-utils", "crossbeam-channel", "num_cpus"]
 nameattr = ["indexmap"]
 
 [dependencies]
-ahash = "0.7"
+ahash = "0.8"
 atty = "0.2"
 crossbeam-utils = { version = "0.8", optional = true }
 crossbeam-channel = { version = "0.5", optional = true }
@@ -33,7 +33,7 @@ itoa = "1"
 log = "0.4"
 num_cpus = { version = "1.10", optional = true }
 num-format = { version = "0.4.3", default-features = false }
-quick-xml = { version = "0.23", default-features = false }
+quick-xml = { version = "0.26", default-features = false }
 rgb = "0.8.13"
 str_stack = "0.1"
 clap = { version = "3.0.1", optional = true, features = ["derive"] }
diff --git a/src/flamegraph/color/mod.rs b/src/flamegraph/color/mod.rs
index 03a6faac..2cbaaecb 100644
--- a/src/flamegraph/color/mod.rs
+++ b/src/flamegraph/color/mod.rs
@@ -205,7 +205,7 @@ impl FromStr for StrokeColor {
             return Ok(StrokeColor::None);
         }
         parse_flat_bgcolor(s)
-            .map(|c| StrokeColor::Color(c))
+            .map(StrokeColor::Color)
             .ok_or_else(|| format!("unknown color: {}", s))
     }
 }
diff --git a/src/flamegraph/color/palettes.rs b/src/flamegraph/color/palettes.rs
index 9ace69e6..fbccd89b 100644
--- a/src/flamegraph/color/palettes.rs
+++ b/src/flamegraph/color/palettes.rs
@@ -73,7 +73,7 @@ pub(super) mod python {
             part.strip_prefix("python")
                 .or_else(|| part.strip_prefix("Python"))
                 .map_or(false, |version| {
-                    version.chars().all(|c| c.is_digit(10) || c == '.')
+                    version.chars().all(|c| c.is_ascii_digit() || c == '.')
                 })
         }) || name.starts_with("<built-in")
             || name.starts_with("<method")
diff --git a/src/flamegraph/mod.rs b/src/flamegraph/mod.rs
index ec149d7a..991497b6 100644
--- a/src/flamegraph/mod.rs
+++ b/src/flamegraph/mod.rs
@@ -478,7 +478,7 @@ where
                 extra: None,
             },
         )?;
-        svg.write_event(Event::End(BytesEnd::borrowed(b"svg")))?;
+        svg.write_event(Event::End(BytesEnd::new("svg")))?;
         svg.write_event(Event::Eof)?;
         return Err(quick_xml::Error::Io(io::Error::new(
             io::ErrorKind::InvalidData,
@@ -526,23 +526,21 @@ where
     let mut thread_rng = rand::thread_rng();
 
     // structs to reuse across loops to avoid allocations
-    let mut cache_g = Event::Start(BytesStart::owned_name("g"));
-    let mut cache_a = Event::Start(BytesStart::owned_name("a"));
-    let mut cache_rect = Event::Empty(BytesStart::owned_name("rect"));
-    let cache_g_end = Event::End(BytesEnd::borrowed(b"g"));
-    let cache_a_end = Event::End(BytesEnd::borrowed(b"a"));
+    let mut cache_g = Event::Start(BytesStart::new("g"));
+    let mut cache_a = Event::Start(BytesStart::new("a"));
+    let mut cache_rect = Event::Empty(BytesStart::new("rect"));
+    let cache_g_end = Event::End(BytesEnd::new("g"));
+    let cache_a_end = Event::End(BytesEnd::new("a"));
 
     // create frames container
     let container_x = format!("{}", XPAD);
     let container_width = format!("{}", image_width as usize - XPAD - XPAD);
-    svg.write_event(Event::Start(
-        BytesStart::borrowed_name(b"svg").with_attributes(vec![
-            ("id", "frames"),
-            ("x", &container_x),
-            ("width", &container_width),
-            ("total_samples", &format!("{}", timemax)),
-        ]),
-    ))?;
+    svg.write_event(Event::Start(BytesStart::new("svg").with_attributes(vec![
+        ("id", "frames"),
+        ("x", &container_x),
+        ("width", &container_width),
+        ("total_samples", &format!("{}", timemax)),
+    ])))?;
 
     // draw frames
     let mut samples_txt_buffer = num_format::Buffer::default();
@@ -625,9 +623,9 @@ where
             &buffer[info],
         )?;
 
-        svg.write_event(Event::Start(BytesStart::borrowed_name(b"title")))?;
-        svg.write_event(Event::Text(BytesText::from_plain_str(title)))?;
-        svg.write_event(Event::End(BytesEnd::borrowed(b"title")))?;
+        svg.write_event(Event::Start(BytesStart::new("title")))?;
+        svg.write_event(Event::Text(BytesText::new(title)))?;
+        svg.write_event(Event::End(BytesEnd::new("title")))?;
 
         // select the color of the rectangle
         let color = if frame.location.function == "--" {
@@ -710,8 +708,8 @@ where
         }
     }
 
-    svg.write_event(Event::End(BytesEnd::borrowed(b"svg")))?;
-    svg.write_event(Event::End(BytesEnd::borrowed(b"svg")))?;
+    svg.write_event(Event::End(BytesEnd::new("svg")))?;
+    svg.write_event(Event::End(BytesEnd::new("svg")))?;
     svg.write_event(Event::Eof)?;
 
     svg.into_inner().flush()?;
diff --git a/src/flamegraph/svg.rs b/src/flamegraph/svg.rs
index 63416a6e..4995b505 100644
--- a/src/flamegraph/svg.rs
+++ b/src/flamegraph/svg.rs
@@ -3,7 +3,7 @@ use std::cell::RefCell;
 use std::io::prelude::*;
 use std::iter;
 
-use quick_xml::events::{BytesCData, BytesEnd, BytesStart, BytesText, Event};
+use quick_xml::events::{BytesCData, BytesDecl, BytesEnd, BytesStart, BytesText, Event};
 use quick_xml::Writer;
 use str_stack::StrStack;
 
@@ -62,27 +62,25 @@ pub(super) fn write_header<W>(
 where
     W: Write,
 {
-    svg.write(br#"<?xml version="1.0" standalone="no"?>"#)?;
-    svg.write(br#"<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">"#)?;
+    svg.write_event(Event::Decl(BytesDecl::new("1.0", None, Some("no"))))?;
+    svg.write_event(Event::DocType(BytesText::from_escaped(r#"svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd""#)))?;
     let imagewidth = opt.image_width.unwrap_or(super::DEFAULT_IMAGE_WIDTH);
-    svg.write_event(Event::Start(
-        BytesStart::borrowed_name(b"svg").with_attributes(vec![
-            ("version", "1.1"),
-            ("width", &*format!("{}", imagewidth)),
-            ("height", &*format!("{}", imageheight)),
-            ("onload", "init(evt)"),
-            ("viewBox", &*format!("0 0 {} {}", imagewidth, imageheight)),
-            ("xmlns", "http://www.w3.org/2000/svg"),
-            ("xmlns:xlink", "http://www.w3.org/1999/xlink"),
-            ("xmlns:fg", "http://github.com/jonhoo/inferno"),
-        ]),
-    ))?;
-    svg.write_event(Event::Comment(BytesText::from_plain_str(
+    svg.write_event(Event::Start(BytesStart::new("svg").with_attributes(vec![
+        ("version", "1.1"),
+        ("width", &*format!("{}", imagewidth)),
+        ("height", &*format!("{}", imageheight)),
+        ("onload", "init(evt)"),
+        ("viewBox", &*format!("0 0 {} {}", imagewidth, imageheight)),
+        ("xmlns", "http://www.w3.org/2000/svg"),
+        ("xmlns:xlink", "http://www.w3.org/1999/xlink"),
+        ("xmlns:fg", "http://github.com/jonhoo/inferno"),
+    ])))?;
+    svg.write_event(Event::Comment(BytesText::new(
         "Flame graph stack visualization. \
          See https://github.com/brendangregg/FlameGraph for latest version, \
          and http://www.brendangregg.com/flamegraphs.html for examples.",
     )))?;
-    svg.write_event(Event::Comment(BytesText::from_plain_str(
+    svg.write_event(Event::Comment(BytesText::new(
         format!("NOTES: {}", opt.notes).as_str(),
     )))?;
     Ok(())
@@ -96,28 +94,22 @@ pub(super) fn write_prelude<'a, W>(
 where
     W: Write,
 {
-    svg.write_event(Event::Start(BytesStart::borrowed_name(b"defs")))?;
-    svg.write_event(Event::Start(BytesStart::borrowed(
-        br#"linearGradient id="background" y1="0" y2="1" x1="0" x2="0""#,
+    svg.write_event(Event::Start(BytesStart::new("defs")))?;
+    svg.write_event(Event::Start(BytesStart::from_content(
+        r#"linearGradient id="background" y1="0" y2="1" x1="0" x2="0""#,
         "linearGradient".len(),
     )))?;
-    svg.write_event(Event::Empty(
-        BytesStart::borrowed_name(b"stop").with_attributes(
-            iter::once(("stop-color", &*style_options.bgcolor1))
-                .chain(iter::once(("offset", "5%"))),
-        ),
-    ))?;
-    svg.write_event(Event::Empty(
-        BytesStart::borrowed_name(b"stop").with_attributes(
-            iter::once(("stop-color", &*style_options.bgcolor2))
-                .chain(iter::once(("offset", "95%"))),
-        ),
-    ))?;
-    svg.write_event(Event::End(BytesEnd::borrowed(b"linearGradient")))?;
-    svg.write_event(Event::End(BytesEnd::borrowed(b"defs")))?;
+    svg.write_event(Event::Empty(BytesStart::new("stop").with_attributes(
+        iter::once(("stop-color", &*style_options.bgcolor1)).chain(iter::once(("offset", "5%"))),
+    )))?;
+    svg.write_event(Event::Empty(BytesStart::new("stop").with_attributes(
+        iter::once(("stop-color", &*style_options.bgcolor2)).chain(iter::once(("offset", "95%"))),
+    )))?;
+    svg.write_event(Event::End(BytesEnd::new("linearGradient")))?;
+    svg.write_event(Event::End(BytesEnd::new("defs")))?;
 
     svg.write_event(Event::Start(
-        BytesStart::borrowed_name(b"style").with_attributes(iter::once(("type", "text/css"))),
+        BytesStart::new("style").with_attributes(iter::once(("type", "text/css"))),
     ))?;
 
     let font_type: Cow<str> = if GENERIC_FONT_FAMILIES.contains(&opt.font_type.as_str()) {
@@ -127,7 +119,7 @@ where
     };
 
     let titlesize = &opt.font_size + 5;
-    svg.write_event(Event::Text(BytesText::from_escaped_str(&format!(
+    svg.write_event(Event::Text(BytesText::from_escaped(&format!(
         "
 text {{ font-family:{}; font-size:{}px; fill:rgb(0,0,0); }}
 #title {{ text-anchor:middle; font-size:{}px; }}
@@ -135,21 +127,20 @@ text {{ font-family:{}; font-size:{}px; fill:rgb(0,0,0); }}
         font_type, &opt.font_size, titlesize,
     ))))?;
     if let Some(strokecolor) = &style_options.strokecolor {
-        svg.write_event(Event::Text(BytesText::from_escaped_str(&format!(
+        svg.write_event(Event::Text(BytesText::from_escaped(&format!(
             "#frames > g > rect {{ stroke:{}; stroke-width:1; }}\n",
             strokecolor
         ))))?;
     }
-    svg.write_event(Event::Text(BytesText::from_escaped_str(include_str!(
+    svg.write_event(Event::Text(BytesText::from_escaped(include_str!(
         "flamegraph.css"
     ))))?;
-    svg.write_event(Event::End(BytesEnd::borrowed(b"style")))?;
+    svg.write_event(Event::End(BytesEnd::new("style")))?;
 
     svg.write_event(Event::Start(
-        BytesStart::borrowed_name(b"script")
-            .with_attributes(iter::once(("type", "text/ecmascript"))),
+        BytesStart::new("script").with_attributes(iter::once(("type", "text/ecmascript"))),
     ))?;
-    svg.write_event(Event::CData(BytesCData::from_str(&format!(
+    svg.write_event(Event::CData(BytesCData::new(&format!(
         "
         var nametype = {};
         var fontsize = {};
@@ -169,21 +160,17 @@ text {{ font-family:{}; font-size:{}px; fill:rgb(0,0,0); }}
         opt.text_truncate_direction == TextTruncateDirection::Right
     ))))?;
     if !opt.no_javascript {
-        svg.write_event(Event::CData(BytesCData::from_str(include_str!(
-            "flamegraph.js"
-        ))))?;
+        svg.write_event(Event::CData(BytesCData::new(include_str!("flamegraph.js"))))?;
     }
-    svg.write_event(Event::End(BytesEnd::borrowed(b"script")))?;
+    svg.write_event(Event::End(BytesEnd::new("script")))?;
 
-    svg.write_event(Event::Empty(
-        BytesStart::borrowed_name(b"rect").with_attributes(vec![
-            ("x", "0"),
-            ("y", "0"),
-            ("width", "100%"),
-            ("height", &*format!("{}", style_options.imageheight)),
-            ("fill", "url(#background)"),
-        ]),
-    ))?;
+    svg.write_event(Event::Empty(BytesStart::new("rect").with_attributes(vec![
+        ("x", "0"),
+        ("y", "0"),
+        ("width", "100%"),
+        ("height", &*format!("{}", style_options.imageheight)),
+        ("fill", "url(#background)"),
+    ])))?;
 
     // We don't care too much about allocating just for the prelude
     let mut buf = StrStack::new();
@@ -284,7 +271,7 @@ where
 
     thread_local! {
         // reuse for all text elements to avoid allocations
-        static TEXT: RefCell<Event<'static>> = RefCell::new(Event::Start(BytesStart::owned_name("text")))
+        static TEXT: RefCell<Event<'static>> = RefCell::new(Event::Start(BytesStart::new("text")))
     };
     TEXT.with(|start_event| {
         if let Event::Start(ref mut text) = *start_event.borrow_mut() {
@@ -304,8 +291,8 @@ where
         TextArgument::String(ref s) => s,
         TextArgument::FromBuffer(i) => &buf[i],
     };
-    svg.write_event(Event::Text(BytesText::from_plain_str(s)))?;
-    svg.write_event(Event::End(BytesEnd::borrowed(b"text")))
+    svg.write_event(Event::Text(BytesText::new(s)))?;
+    svg.write_event(Event::End(BytesEnd::new("text")))
 }
 
 // Imported from the `enquote` crate @ 1.0.3.
diff --git a/tests/common/collapse.rs b/tests/common/collapse.rs
index 1a1c1689..f272b3be 100644
--- a/tests/common/collapse.rs
+++ b/tests/common/collapse.rs
@@ -15,7 +15,7 @@ where
     let mut line_num = 1;
     for line in result.lines() {
         let line = if strip_quotes {
-            line.unwrap().replace("\"", "").replace("'", "")
+            line.unwrap().replace('\"', "").replace('\'', "")
         } else {
             line.unwrap()
         };
diff --git a/tests/data/flamegraph/austin/flame.svg b/tests/data/flamegraph/austin/flame.svg
index 45452b5e..f3979ece 100644
--- a/tests/data/flamegraph/austin/flame.svg
+++ b/tests/data/flamegraph/austin/flame.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="294" onload="init(evt)" viewBox="0 0 1200 294" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="294" onload="init(evt)" viewBox="0 0 1200 294" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/colors/async-profiler-java.svg b/tests/data/flamegraph/colors/async-profiler-java.svg
index 163b99ce..60b182e2 100644
--- a/tests/data/flamegraph/colors/async-profiler-java.svg
+++ b/tests/data/flamegraph/colors/async-profiler-java.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1958" onload="init(evt)" viewBox="0 0 1200 1958" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1958" onload="init(evt)" viewBox="0 0 1200 1958" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/colors/deterministic.svg b/tests/data/flamegraph/colors/deterministic.svg
index 1e843aed..eeb2defd 100644
--- a/tests/data/flamegraph/colors/deterministic.svg
+++ b/tests/data/flamegraph/colors/deterministic.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1958" onload="init(evt)" viewBox="0 0 1200 1958" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1958" onload="init(evt)" viewBox="0 0 1200 1958" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/colors/java.svg b/tests/data/flamegraph/colors/java.svg
index 9c1be113..9225b953 100644
--- a/tests/data/flamegraph/colors/java.svg
+++ b/tests/data/flamegraph/colors/java.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1206" onload="init(evt)" viewBox="0 0 1200 1206" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1206" onload="init(evt)" viewBox="0 0 1200 1206" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/colors/js.svg b/tests/data/flamegraph/colors/js.svg
index 2424b640..7fe419cd 100644
--- a/tests/data/flamegraph/colors/js.svg
+++ b/tests/data/flamegraph/colors/js.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="390" onload="init(evt)" viewBox="0 0 1200 390" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="390" onload="init(evt)" viewBox="0 0 1200 390" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/differential/diff-negated.svg b/tests/data/flamegraph/differential/diff-negated.svg
index 4f9bf611..9a7d2d16 100644
--- a/tests/data/flamegraph/differential/diff-negated.svg
+++ b/tests/data/flamegraph/differential/diff-negated.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/differential/diff.svg b/tests/data/flamegraph/differential/diff.svg
index d99cb67a..4da6d041 100644
--- a/tests/data/flamegraph/differential/diff.svg
+++ b/tests/data/flamegraph/differential/diff.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/example-perf-stacks/example-perf-stacks.svg b/tests/data/flamegraph/example-perf-stacks/example-perf-stacks.svg
index e7c07460..84bb6507 100644
--- a/tests/data/flamegraph/example-perf-stacks/example-perf-stacks.svg
+++ b/tests/data/flamegraph/example-perf-stacks/example-perf-stacks.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1270" onload="init(evt)" viewBox="0 0 1200 1270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1270" onload="init(evt)" viewBox="0 0 1200 1270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/factor/factor-2.5.svg b/tests/data/flamegraph/factor/factor-2.5.svg
index 77c593c4..21c933cb 100644
--- a/tests/data/flamegraph/factor/factor-2.5.svg
+++ b/tests/data/flamegraph/factor/factor-2.5.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/flamechart/flame.svg b/tests/data/flamegraph/flamechart/flame.svg
index b2ecc8b8..31f342c3 100644
--- a/tests/data/flamegraph/flamechart/flame.svg
+++ b/tests/data/flamegraph/flamechart/flame.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="310" onload="init(evt)" viewBox="0 0 1200 310" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="310" onload="init(evt)" viewBox="0 0 1200 310" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/fractional-samples/fractional-reversed.svg b/tests/data/flamegraph/fractional-samples/fractional-reversed.svg
index ca0b35d5..a9f3b4aa 100644
--- a/tests/data/flamegraph/fractional-samples/fractional-reversed.svg
+++ b/tests/data/flamegraph/fractional-samples/fractional-reversed.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/grey-frames/grey-frames.svg b/tests/data/flamegraph/grey-frames/grey-frames.svg
index ea2191ba..56eaa363 100644
--- a/tests/data/flamegraph/grey-frames/grey-frames.svg
+++ b/tests/data/flamegraph/grey-frames/grey-frames.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/inverted/inverted.svg b/tests/data/flamegraph/inverted/inverted.svg
index 997edc08..04161cf5 100644
--- a/tests/data/flamegraph/inverted/inverted.svg
+++ b/tests/data/flamegraph/inverted/inverted.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1194" onload="init(evt)" viewBox="0 0 1200 1194" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1194" onload="init(evt)" viewBox="0 0 1200 1194" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/nameattr/nameattr.svg b/tests/data/flamegraph/nameattr/nameattr.svg
index 23ae4088..1cc55680 100644
--- a/tests/data/flamegraph/nameattr/nameattr.svg
+++ b/tests/data/flamegraph/nameattr/nameattr.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/nameattr/nameattr_duplicate_attributes.svg b/tests/data/flamegraph/nameattr/nameattr_duplicate_attributes.svg
index 48aa2518..1371745e 100644
--- a/tests/data/flamegraph/nameattr/nameattr_duplicate_attributes.svg
+++ b/tests/data/flamegraph/nameattr/nameattr_duplicate_attributes.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/narrow-blocks/narrow-blocks.svg b/tests/data/flamegraph/narrow-blocks/narrow-blocks.svg
index 7b96faa0..8113ce66 100644
--- a/tests/data/flamegraph/narrow-blocks/narrow-blocks.svg
+++ b/tests/data/flamegraph/narrow-blocks/narrow-blocks.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="166" onload="init(evt)" viewBox="0 0 1200 166" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="166" onload="init(evt)" viewBox="0 0 1200 166" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/colordiffusion.svg b/tests/data/flamegraph/options/colordiffusion.svg
index 21686ef1..a43a4f3c 100644
--- a/tests/data/flamegraph/options/colordiffusion.svg
+++ b/tests/data/flamegraph/options/colordiffusion.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/count_name_simple.svg b/tests/data/flamegraph/options/count_name_simple.svg
index 130492af..eba06a6c 100644
--- a/tests/data/flamegraph/options/count_name_simple.svg
+++ b/tests/data/flamegraph/options/count_name_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/count_name_with_symbols.svg b/tests/data/flamegraph/options/count_name_with_symbols.svg
index 80bcf3f1..7a861a3d 100644
--- a/tests/data/flamegraph/options/count_name_with_symbols.svg
+++ b/tests/data/flamegraph/options/count_name_with_symbols.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/default.svg b/tests/data/flamegraph/options/default.svg
index d99cb67a..4da6d041 100644
--- a/tests/data/flamegraph/options/default.svg
+++ b/tests/data/flamegraph/options/default.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_cursive.svg b/tests/data/flamegraph/options/font_type_cursive.svg
index 4e87db51..37c1bbe5 100644
--- a/tests/data/flamegraph/options/font_type_cursive.svg
+++ b/tests/data/flamegraph/options/font_type_cursive.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_fantasy.svg b/tests/data/flamegraph/options/font_type_fantasy.svg
index 4af0b171..02cc231b 100644
--- a/tests/data/flamegraph/options/font_type_fantasy.svg
+++ b/tests/data/flamegraph/options/font_type_fantasy.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_monospace.svg b/tests/data/flamegraph/options/font_type_monospace.svg
index d99cb67a..4da6d041 100644
--- a/tests/data/flamegraph/options/font_type_monospace.svg
+++ b/tests/data/flamegraph/options/font_type_monospace.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_sans-serif.svg b/tests/data/flamegraph/options/font_type_sans-serif.svg
index bc02a734..912a2768 100644
--- a/tests/data/flamegraph/options/font_type_sans-serif.svg
+++ b/tests/data/flamegraph/options/font_type_sans-serif.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_serif.svg b/tests/data/flamegraph/options/font_type_serif.svg
index 0b18e81b..b6e76a95 100644
--- a/tests/data/flamegraph/options/font_type_serif.svg
+++ b/tests/data/flamegraph/options/font_type_serif.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_simple.svg b/tests/data/flamegraph/options/font_type_simple.svg
index fdc23053..5c0253a1 100644
--- a/tests/data/flamegraph/options/font_type_simple.svg
+++ b/tests/data/flamegraph/options/font_type_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/font_type_with_quote.svg b/tests/data/flamegraph/options/font_type_with_quote.svg
index eb957fb6..2f630377 100644
--- a/tests/data/flamegraph/options/font_type_with_quote.svg
+++ b/tests/data/flamegraph/options/font_type_with_quote.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/name_type_simple.svg b/tests/data/flamegraph/options/name_type_simple.svg
index e2879240..aef9c4fb 100644
--- a/tests/data/flamegraph/options/name_type_simple.svg
+++ b/tests/data/flamegraph/options/name_type_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/name_type_with_backslash.svg b/tests/data/flamegraph/options/name_type_with_backslash.svg
index 52a7de3a..305e21d1 100644
--- a/tests/data/flamegraph/options/name_type_with_backslash.svg
+++ b/tests/data/flamegraph/options/name_type_with_backslash.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/name_type_with_quote.svg b/tests/data/flamegraph/options/name_type_with_quote.svg
index 51162a1f..0463c025 100644
--- a/tests/data/flamegraph/options/name_type_with_quote.svg
+++ b/tests/data/flamegraph/options/name_type_with_quote.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/notes_simple.svg b/tests/data/flamegraph/options/notes_simple.svg
index 3528bd2c..8666b52e 100644
--- a/tests/data/flamegraph/options/notes_simple.svg
+++ b/tests/data/flamegraph/options/notes_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: Test Notes-->
     <defs>
diff --git a/tests/data/flamegraph/options/notes_with_symbols.svg b/tests/data/flamegraph/options/notes_with_symbols.svg
index 8344fd79..43fac79e 100644
--- a/tests/data/flamegraph/options/notes_with_symbols.svg
+++ b/tests/data/flamegraph/options/notes_with_symbols.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: Test Notes &lt;&amp; &apos; &quot;-->
     <defs>
diff --git a/tests/data/flamegraph/options/search_color.svg b/tests/data/flamegraph/options/search_color.svg
index 3215cd10..3ec51560 100644
--- a/tests/data/flamegraph/options/search_color.svg
+++ b/tests/data/flamegraph/options/search_color.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/stroke_color.svg b/tests/data/flamegraph/options/stroke_color.svg
index ee806618..e995a7d3 100644
--- a/tests/data/flamegraph/options/stroke_color.svg
+++ b/tests/data/flamegraph/options/stroke_color.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/subtitle_simple.svg b/tests/data/flamegraph/options/subtitle_simple.svg
index 4a1de480..e798a850 100644
--- a/tests/data/flamegraph/options/subtitle_simple.svg
+++ b/tests/data/flamegraph/options/subtitle_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="270" onload="init(evt)" viewBox="0 0 1200 270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="270" onload="init(evt)" viewBox="0 0 1200 270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/subtitle_with_symbols.svg b/tests/data/flamegraph/options/subtitle_with_symbols.svg
index d911c099..1dcaa272 100644
--- a/tests/data/flamegraph/options/subtitle_with_symbols.svg
+++ b/tests/data/flamegraph/options/subtitle_with_symbols.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="270" onload="init(evt)" viewBox="0 0 1200 270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="270" onload="init(evt)" viewBox="0 0 1200 270" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/title_simple.svg b/tests/data/flamegraph/options/title_simple.svg
index ca94ff9e..ec6e5abd 100644
--- a/tests/data/flamegraph/options/title_simple.svg
+++ b/tests/data/flamegraph/options/title_simple.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/title_with_symbols.svg b/tests/data/flamegraph/options/title_with_symbols.svg
index 01ee663c..b6f8c2fd 100644
--- a/tests/data/flamegraph/options/title_with_symbols.svg
+++ b/tests/data/flamegraph/options/title_with_symbols.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="246" onload="init(evt)" viewBox="0 0 1200 246" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/options/truncate-right.svg b/tests/data/flamegraph/options/truncate-right.svg
index 8cdb7744..15d4690c 100644
--- a/tests/data/flamegraph/options/truncate-right.svg
+++ b/tests/data/flamegraph/options/truncate-right.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1206" onload="init(evt)" viewBox="0 0 1200 1206" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1206" onload="init(evt)" viewBox="0 0 1200 1206" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/palette-map/consistent-palette.svg b/tests/data/flamegraph/palette-map/consistent-palette.svg
index 09ae4c7c..d1a7e7fa 100644
--- a/tests/data/flamegraph/palette-map/consistent-palette.svg
+++ b/tests/data/flamegraph/palette-map/consistent-palette.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all-reversed-stacks.svg b/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all-reversed-stacks.svg
index eb035fda..a4e8e5ec 100644
--- a/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all-reversed-stacks.svg
+++ b/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all-reversed-stacks.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>
diff --git a/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all.svg b/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all.svg
index 09ae4c7c..d1a7e7fa 100644
--- a/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all.svg
+++ b/tests/data/flamegraph/perf-vertx-stacks/perf-vertx-stacks-01-collapsed-all.svg
@@ -1,4 +1,6 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" width="1200" height="1190" onload="init(evt)" viewBox="0 0 1200 1190" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno">
     <!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.-->
     <!--NOTES: -->
     <defs>