More updates to the Text chapter of the Emacs manual, and related nodes.
Make the documentation of Enriched Mode shorter, since it's
practically unused.
* text.texi (TeX Mode): Mention AUCTeX package.
(TeX Editing): Add xref to documentation for Occur.
(LaTeX Editing): Add xref to Completion node.
(TeX Print): Fix description of tex-directory.
(Enriched Text): Renamed from Formatted Text. Make this node and
its subnodes less verbose, since text/enriched files are
practically unused.
(Enriched Mode): Renamed from Requesting Formatted Text.
(Format Colors): Node deleted.
(Enriched Faces): Renamed from Format Faces. Describe commands
for applying colors too.
(Forcing Enriched Mode): Node deleted; merged into Enriched Mode.
* frames.texi (Menu Mouse Clicks): Tweak description of C-Mouse-2.