* Implement mail sending.

* Implement mail sending.

* Implement M-x append-to-file, M-x tabify, C-u M-x indent-region.

* Change M-x undo to move point to the location of the most recent
  undone change.  This restores the behavior that was in effect before
  the last change to undo.

* Implement variable `enable-emacs-write-file-message', by default
  true, which changes file-output messages to be like Emacs.

* Fix simple bugs in auto save code, local variable binding.

* Add new slot to buffer, LOCAL-BINDINGS-INSTALLED?, that speeds up
  the test to determine if the buffer's local bindings are the ones
  currently installed in the variable value cells.

* Reimplement character search, character match, and string match.
  New implementation does not use regular expression primitives.
  A new set of low-level search and match primitives provides more
  power than the old ones did.

* Implement `run-synchronous-process'.  Reimplement `shell-command'
  and `shell-command-region' in terms of this new procedure.

* Implement `insert-region', which copies text directly from one
  buffer to another without making an intermediate copy.