Decorated the --skip-sprockets like any other.

guides/source/asset_pipeline.md

@@ -474,7 +474,7 @@ which contains these lines:
 ```
 
 Rails create `app/assets/stylesheets/application.css` regardless of whether the
---skip-sprockets option is used when creating a new Rails application. This is
+`--skip-sprockets` option is used when creating a new Rails application. This is
 so you can easily add asset pipelining later if you like.
 
 The directives that work in JavaScript files also work in stylesheets