sass-rails helpers - hyphenated in Sass, underscored in Ruby.

railties/guides/source/asset_pipeline.textile

@@ -170,15 +170,15 @@ Note that the closing tag cannot be of the style +-%>+.
 
 h5. CSS and Sass
 
-When using the asset pipeline, paths to assets must be re-written and +sass-rails+ provides +_url+ and +_path+ helpers for the following asset classes: image, font, video, audio, JavaScript and stylesheet.
+When using the asset pipeline, paths to assets must be re-written and +sass-rails+ provides +-url+ and +-path+ helpers (hyphenated in Sass, underscored in Ruby) for the following asset classes: image, font, video, audio, JavaScript and stylesheet.
 
-* +image_url("rails.png")+ becomes +url(/assets/rails.png)+.
-* +image_path("rails.png")+ becomes +"/assets/rails.png"+.
+* +image-url("rails.png")+ becomes +url(/assets/rails.png)+
+* +image-path("rails.png")+ becomes +"/assets/rails.png"+.
 
 The more generic form can also be used but the asset path and class must both be specified:
 
-* +asset_url("rails.png", image)+ becomes +url(/assets/rails.png)+.
-* +asset_path("rails.png", image)+ becomes +"/assets/rails.png"+.
+* +asset-url("rails.png", image)+ becomes +url(/assets/rails.png)+
+* +asset-path("rails.png", image)+ becomes +"/assets/rails.png"+
 
 h5. JavaScript/CoffeeScript and ERB