Merge from origin/emacs-26

615cff42 (origin/emacs-26) Fix process filter documentation (Bug#13400)
beb1d222 Fix query-replace-regexp undo feature

# Conflicts:
#	test/lisp/replace-tests.el
1 job for master in 61 minutes and 8 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #3043
test-all

01:01:08

 
Name Stage Failure
failed
test-all Test
Makefile:318: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
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:959: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1