Make sure that generator's default banner is showing its namespace

Currently if you run a namespaced generator help message, it would show up only the latter part of the generator:

[~/Projects/test_edge] rails g rspec:install --help
Usage:
  rails generate install  [options]

I found out that there's a method name namespace which returns the correct generator with namespaced name, so now if you run it it would be:

[~/Projects/test_edge] rails g rspec:install --help
Usage:
  rails generate rspec:install [options]

However, for those Rails's internal generators, it would show the default rails: namespace. So I have to #sub those out.

I don't see where I should put the test for this functionality. If the test is required, please guide me the best place for it.

Thank you, and happy new year!