More changes for the manual

More changes for the manual

* doc/emacs/anti.texi (Antinews): Replace 25.2 with 25.3.
Reported by Michael Albinus <michael.albinus@gmx.de> in
emacs-manual-bugs@gnu.org.

* doc/emacs/custom.texi (Function Keys): Improve wording.
Suggested by clemens.radermacher@posteo.de in
emacs-manual-bugs@gnu.org.

* doc/emacs/misc.texi (History References): Improve punctuation.
(Terminal emulator): Fix a typo.
(Term Mode): Remove redundant repeated text.
(Invoking emacsclient): Improve wording.  Suggested by Alberto
Sartori <alberto.sartori@sissa.it> in emacs-manual-bugs@gnu.org.

* doc/emacs/files.texi (Visiting): Fix last change.