rails/rails — pull request #7370 by josh (2012-08-16 18:56:57+00:00)
Title: Add activemodel dep to actionpack gemspec

`require 'action_dispatch'` immediately tries to pull in activemodel.

ils/rails/blob/master/actionpack/lib/action_dispatch.rb#L29

ought to be declared in the gemspec so AP can be used as a standalone gem definition.

/cc @tenderlove