Hello Emacs devs,

Attached is a patch to add `electric-pair-local-mode'. It's almost an
exact copy of `electric-indent-local-mode'. I like using
`electric-pair-mode', except in Lisp-like languages where I prefer
paredit, so having a local mode is useful to me.

I've tried mentioning it in the same places as
`electric-indent-local-mode', I hope I did it right.

Please let me know what you think.