Reword some doc/emacs to remove/reduce some overly long/short lines.

Reword some doc/emacs to remove/reduce some overly long/short lines.

* xresources.texi (Resources):
* mule.texi (Language Environments):
* misc.texi (Amusements):
* maintaining.texi (VC Change Log):
* frames.texi (Fonts):
* custom.texi (Specifying File Variables, Minibuffer Maps):
* cmdargs.texi (Initial Options):
* building.texi (Flymake):
Reword to remove/reduce some overly long/short lines.