* lisp/textmodes/tex-mode.el (tex-math, tex-verbatim): Remove "-face"
suffix from face names.
(tex-math-face, tex-verbatim-face):
New backward-compatibility aliases for renamed faces.
(tex-math-face, tex-verbatim-face): Use renamed tex-mode faces.
(tex-insert-quote): Use `tex-verbatim-face' variable instead of
literal face name.