execute (Gem::Commands::UninstallCommand)

    # File lib/rubygems/commands/uninstall_command.rb, line 70
      def execute
        get_all_gem_names.each do |gem_name|
          begin
            Gem::Uninstaller.new(gem_name, options).uninstall
          rescue Gem::GemNotInHomeException => e
            spec = e.spec
            alert("In order to remove #{spec.name}, please execute:\n" \
                  "\tgem uninstall #{spec.name} --install-dir=#{spec.installation_path}")
          end
        end
      end