Merge pull request #490 from ghiculescu/patch-1

Clarify what `config.assets.debug` does

Author: rafaelfranca

README.md

@@ -86,7 +86,7 @@ When enabled, fingerprints will be added to asset filenames.
 
 **`config.assets.debug`**
 
-Enable expanded asset debugging mode. Individual files will be served to make referencing filenames in the web console easier. This feature will eventually be deprecated and replaced by Source Maps in Sprockets 3.x.
+Enable asset debugging mode. A source map will be included with each asset when this is true.
 
 **`config.assets.compile`**