diff --git a/compiler/rustc_error_codes/src/error_codes/E0722.md b/compiler/rustc_error_codes/src/error_codes/E0722.md
index fe2b6d27457..570717a92bd 100644
--- a/compiler/rustc_error_codes/src/error_codes/E0722.md
+++ b/compiler/rustc_error_codes/src/error_codes/E0722.md
@@ -18,6 +18,7 @@ The `#[optimize]` attribute should be used as follows:
   that's faster rather than smaller
 
 For example:
+
 ```
 #![feature(optimize_attribute)]