[21.5R21.4] simple.el GNU syncs

21.5 RECOMMEND 21.4 Here's some trivialish GNU Emacs CVS syncs for simple.el that I've come across in the new vc package. Will commit in a couple of days unless there are objections. Vin, the patch applies to 21.4 with some line offsets, so if you think these are innocent enough for the stable branch, I have no objections to applying these there as well. 2006-04-23 Ville Skyttä <scop(a)xemacs.org&gt; * simple.el: Sync some bits with GNU Emacs CVS: (goto-line): Add optional `buffer' argument. (next-line-add-newlines): Update docstring. (next-line): Make `count' argument optional. (previous-line): Ditto.