diff --git a/tokio/src/runtime/builder.rs b/tokio/src/runtime/builder.rs
index 21d5913ab6f..970f3490745 100644
--- a/tokio/src/runtime/builder.rs
+++ b/tokio/src/runtime/builder.rs
@@ -578,7 +578,6 @@ impl Builder {
     /// ```
     /// # use tokio::runtime;
     /// # use std::time::Duration;
-    ///
     /// # pub fn main() {
     /// let rt = runtime::Builder::new_multi_thread()
     ///     .thread_keep_alive(Duration::from_millis(100))
@@ -606,7 +605,6 @@ impl Builder {
     ///
     /// ```
     /// # use tokio::runtime;
-    ///
     /// # pub fn main() {
     /// let rt = runtime::Builder::new_multi_thread()
     ///     .global_queue_interval(31)
@@ -637,7 +635,6 @@ impl Builder {
     ///
     /// ```
     /// # use tokio::runtime;
-    ///
     /// # pub fn main() {
     /// let rt = runtime::Builder::new_multi_thread()
     ///     .event_interval(31)