GitLab

* doc/emacs/building.texi (Compilation): Say what the -k flag to make does.
Move subprocess discussion to Compilation Shell.
(Compilation Mode): Add xref for grep, occur, and mouse
references.  Define "locus".
(Grep Searching): Use @command.

* doc/emacs/programs.texi (Symbol Completion): M-TAB can now use Semantic.
(Semantic): Add cindex entries for Semantic.