* misc/ruby-electric.el: Import ruby-electric.el 2.1 from
  https://github.com/knu/ruby-electric.el.

  * Hitting the newline-and-indent key within a comment fires
    comment-indent-new-line.

  * Introduce a new feature
    `ruby-electric-autoindent-on-closing-char`.

  * Fix fallback behavior of ruby-electric-space/return that
    caused error with auto-complete.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43448 b2dd03c8-39d4-4d8f-98ff-823fe69b080e