Fix markdown escaping

Closes #29255

Release Notes:

- Improved handling of markdown escape sequences

crates/markdown/examples/markdown.rs

@@ -21,7 +21,6 @@ function a(b: T) {
 }
 ```
 
-
 Remember, markdown processors may have slight differences and extensions, so always refer to the specific documentation or guides relevant to your platform or editor for the best practices and additional features.
 "#;