afaur/ruby-nicefn

This cops checks for use of extend self or module_function in a module.

Supported styles are: modulefunction, extendself.

Example: EnforcedStyle: module_function (default)

# bad
module Test
  extend self
  # ...
end

# good
module Test
  module_function
  # ...
end

Example: EnforcedStyle: extend_self

# bad
module Test
  module_function
  # ...
end

# good
module Test
  extend self
  # ...
end

These offenses are not auto-corrected since there are different implications to each approach.