samg/diffy — pull request #10 by lritter (2012-05-30 16:42:29+00:00)
Title: Allow return of empty diffs using :allow_empty_diff option

it's helpful in some use cases to return an empty diff if there are no differences. This patch allows that option and should be backwards-compatible.

- Pass the :allow_empty_diff option to return an empty string when there are no differences
- Added test case.