instance method github

# File railties/lib/rails/generators/actions.rb, line 125
      def github(repo, options = {}, &block)
        str = [quote(repo)]
        str << quote(options) unless options.empty?
        str = str.join(", ")
        log :github, "github #{str}"

        in_root do
          if @indentation.zero?
            append_file_with_newline "Gemfile", "\ngithub #{str} do", force: true
          else
            append_file_with_newline "Gemfile", "#{indentation}github #{str} do", force: true
          end
          with_indentation(&block)
          append_file_with_newline "Gemfile", "#{indentation}end", force: true
        end
      end