run

# File lib/bundler/cli/open.rb, line 13
    def run
      editor = [ENV["BUNDLER_EDITOR"], ENV["VISUAL"], ENV["EDITOR"]].find {|e| !e.nil? && !e.empty? }
      return Bundler.ui.info("To open a bundled gem, set $EDITOR or $BUNDLER_EDITOR") unless editor
      return unless spec = Bundler::CLI::Common.select_spec(name, :regex_match)
      path = spec.full_gem_path
      Dir.chdir(path) do
        command = Shellwords.split(editor) + [path]
        Bundler.with_original_env do
          system(*command)
        end || Bundler.ui.info("Could not run '#{command.join(" ")}'")
      end
    end