alias_method_chain (Module)

    # File lib/gettext/rails_compat.rb, line 7
        def alias_method_chain(target, feature)
          # Strip out punctuation on predicates or bang methods since
          # e.g. target?_without_feature is not a valid method name.
          aliased_target, punctuation = target.to_s.sub(/([?!=])$/, ''), $1
          yield(aliased_target, punctuation) if block_given?
          alias_method "#{aliased_target}_without_#{feature}#{punctuation}", target
          alias_method target, "#{aliased_target}_with_#{feature}#{punctuation}"
        end