whitespace

Author: tshepang

src/conventions.md

@@ -46,6 +46,7 @@ The Rust repository contains quite a lot of Python code. We try to keep
 it both linted and formatted by the [ruff] tool.
 
 When modifying Python code, use this command to format it:
+
 ```console
 ./x test tidy --extra-checks py:fmt --bless
 ```