Re: abbrev-mode - toggle-abbrev-mode

Adding emacs-devel because I think this is a more general policy question. In general some-mode and toggle-some-mode are different. (some-mode nil) is equivalent to (toggle-some-mode), while (some-mode 1) and (some-mode -1) unconditionally turn it on and off respectively. As far as I know, XEmacs tries to avoid the toggle-, turn-on-, turn-off-some-mode style. I would prefer to avoid introducing it if Emacs is not actively promoting that style (in fact, I'd prefer to ask Emacs to do things our way, on principle, not out of laziness ;-).