Fixes for "Maintainer:" and related lines

Mostly, this just removes "Maintainer: emacs-devel@gnu.org" lines,
which are not that useful.  It also cleans up and regularizes a
few similar lines.
2 jobs for master in 59 minutes and 23 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #1852
test-all

00:59:23

failed #1853
test-filenotify-gio

00:33:19

 
Name Stage Failure
failed
test-all Test
make[2]: *** [check-doit] Error 1
Makefile:318: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:293: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:957: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1
failed
test-filenotify-gio Test
   FAILED  auto-revert-test02-auto-revert-deleted-file-remote

make[1]: *** [lisp/autorevert-tests.log] Error 1
Makefile:182: recipe for target 'lisp/autorevert-tests.log' failed
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:247: recipe for target 'lisp/autorevert-tests' failed
make: *** [lisp/autorevert-tests] Error 2
make: Leaving directory '/builds/emacs/emacs/test'
ERROR: Job failed: exit code 1