rails/rails — pull request #4826 by kennyj (2012-02-01 17:38:04+00:00)
Title: Fix GH #4737. Missing helper file (LoadError) in mountable plugin.

I think that the cause of the problem is difference of concept for underscore and camelize in helpers.rb (actionpack) and plugins_new_generator.rb (railties)

I modified plugins new generator's acceptable characters for constants name. because I prevent this issue.
"-" is not acceptable characters anymore :)

Please see https://github.com/rails/rails/issues/4737.

/cc @josevalim @drogus