Document fido-mode

* doc/emacs/buffers.texi (Icomplete): Document Fido Mode.

* etc/NEWS: Mention Fido Mode.

* lisp/icomplete.el (icomplete-mode): Ensure fido-mode is off.
(fido-mode): Ensure icomplete-mode is off.
(icomplete-magic-ido-ret): Don't force completions if no
completions.
1 job for master in 90 minutes (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #4117
test-all

01:30:00

 
Name Stage Failure
failed
test-all Test The script exceeded the maximum execution time set for the job
make -C test check-expensive
make[1]: Entering directory '/builds/emacs/emacs/test'
rm -f ./*.tmp
make[2]: Entering directory '/builds/emacs/emacs/test'
make[3]: Entering directory '/builds/emacs/emacs/test'
ELC lisp/net/tramp-tests.elc
GEN lisp/net/tramp-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-d0b76032 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds