railties/lib/rails/generators/rails/generator/USAGE
Description:
Generates a new generator at lib/generators. Pass the generator name as an argument,
either CamelCased or snake_cased.
Example:
`bin/rails generate generator Awesome`
creates a standard awesome generator:
lib/generators/awesome/
lib/generators/awesome/awesome_generator.rb
lib/generators/awesome/USAGE
lib/generators/awesome/templates/
test/lib/generators/awesome_generator_test.rb