* misc/ruby-electric.el: Avoid use of the interactive function
  `self-insert-command` which fires `post-self-insert-hook` and
  `post-command-hook`, to make the ruby-electric commands work
  nicely with those minor modes that make use of them to do
  similar input assistance, such as electric-pair-mode,
  autopair-mode and smartparens-mode.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43051 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* misc/ruby-electric.el (ruby-electric-delete-backward-char): Add
  support for smartparen-mode.

* misc/ruby-electric.el (ruby-electric-cua-replace-region-maybe)
  (ruby-electric-cua-delete-region-maybe): New functions that
  combine `ruby-electric-cua-*-region` with
  `ruby-electric-cua-*-region-p`, using a slightly better way to
  detect if it is in cua-mode.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43053 b2dd03c8-39d4-4d8f-98ff-823fe69b080e