# File lib/bundler/gem_helper.rb, line 111
    def tag_version
      sh "git tag -a -m \"Version #{version}\" #{version_tag}"
      Bundler.ui.confirm "Tagged #{version_tag}"
      yield if block_given?
    rescue
      Bundler.ui.error "Untagged #{version_tag} due to error"
      sh_with_code "git tag -d #{version_tag}"
      raise
    end