guard/listen — pull request #118 by nilbus (2013-05-27 23:03:07+00:00)
Title: Prevent polling just because the adapter gem was already required

Listen::Adapter.load_dependend_adapter returns true even if already
loaded. Otherwise, if (for example) `gem "rb-fsevent"` already appears
in a Gemfile or some other gem requires the adapter_gem before we do,
Listen will always fall back to polling.

Any thoughts on this approach of fixing the problem?