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/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>