bug#38392: zap-up-to-char should appear in "Deletion and Killing" Emacs info section and "Command Index"

[Drew Adams <drew.adams@oracle.com>]

> not zap-***up***-to-char.

In Isearch we now have `isearch-yank-until-char'.

So we now have two different ways to name something
that deals with text from point forward to, but not
including, the position of some char: "up to" vs
"until".

It would be better to have a single way to name this.

---

Considering that the names `zap-to-char' and
`zap-up-to-char' are so close, and they can be
confused (witness Eli's missing the difference
here, at first), "until" seems a bit better.

On the other hand, "until" has a strong connotation
of time, and a weak one of space/distance.  And "up
to" is pretty clear, if taken apart from "to".

Really, `zap-to-char' should probably be called
`zap-through-char'.  I'd suggest using the terms
"until" (for "up to") and "through" (for zap "to").

In the improvements I suggested for Isearch (bug
#37417, emacs-devel thread "PATCH:
isearch-yank-until-match" and part of thread
"PATCH: isearch-yank-until-char"), I used
"through" for commands that act from point through
some position: `isearch-yank-through-new-match',
`isearch-yank-through-key-move', and
`isearch-yank-through-rec-edit-move'.