grunt.file.read() breaks when path starts with a "#" symbol

I have tried to use [this](https://github.com/paazmaya/grunt-trimtrailingspaces) Grunt task, that uses Grunt's `grunt.file.read()` method, and noticed the following issue:
When the given path starts with a "#" symbol (such as "#work/stuff"), the following error is thrown:
`Warning: Unable to read "undefined" file (Error code: ENOENT)`
The original issue with the task could be found [here](https://github.com/paazmaya/grunt-trimtrailingspaces/issues/15).
Grunt 0.4.5
OS X 10.10.1

Start by reproducing the failure through grunt.file.read() with a path such as "#work/stuff", then trace the Grunt file API handling of that path. Done means paths beginning with "#" are read successfully instead of producing an undefined filename and ENOENT error, with coverage for the reported case.

Written by the indexing model from the issue text.