README.md in slim-grunt-helpers-0.3.0 vs README.md in slim-grunt-helpers-0.4.0

@@ -79,10 +79,10 @@
 `require` allows to include files only if they are not already included. Uses same params as `include`.  
 `require_tree` instead, require an entire directory tree, using [Dir glob](http://ruby-doc.org/core-1.9.3/Dir.html#method-c-glob) pattern. It accepts the following parameters:
 
 - `root_path` which is the path will be used as base directory (and **omitted in tags**)
 - `pattern` which is the pattern accepted by [Dir glob](http://ruby-doc.org/core-1.9.3/Dir.html#method-c-glob), used to search files
-- `options` which are directly passed to `require`
+- `options` which accepts `:transform_ext` which will replace the file extension. Other options are directly passed to `require`
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)