perl Module::Underscore

I present my module Module::Underscore. It allow you to do that :

underscore_to_module('test_app') => Test::App
underscore_to_module('test_') => Test::
underscore_to_module('Hello World!') => Hello::World::

module_to_underscore('Test::App') => test_app
module_to_underscore('Test::App::') => test_app_
module_to_underscore('Hello World!') => hello_world_

I use it for config file for example :

routes:
  test_app: /
  test_app_auth: /auth

More simple that write this :

routes:
  Test::App: /
  Test::App::auth: /auth