Add `isearch-yank-until-char'

* lisp/isearch.el (isearch-yank-until-char): New function.
  (isearch-mode-map, isearch-menu-bar-yank-map): Add it.
  (isearch-forward): Document the new binding.

* doc/emacs/search.texi (Isearch Yanking): Document the feature.

* etc/NEWS: Mention the above.
1 job for master in 56 minutes and 27 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #3261
test-all

00:56:27

 
Name Stage Failure
failed
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:294: recipe for target 'check-expensive' failed
make[1]: Leaving directory '/builds/emacs/emacs/test'
make[2]: *** [check-doit] Error 1
make[1]: *** [check-expensive] Error 2
make: *** [check-expensive] Error 2
Makefile:959: recipe for target 'check-expensive' failed
ERROR: Job failed: exit code 1