* pr/1620:
  Add updated type-spec to Emacs skeletons of OTP behaviours

The changes are based on the latest versions of following modules
and are also similar to gen_statem Emacs skeleton. Note that the
gen_fsm is not updated because it is deprecated.

application:
* add/update type-spec for all callbacks
* add start_phase/3 callback
* add prep_stop/1 callback
* add config_change/3 callback

supervisor:
* add/update type-spec for all callbacks

supervisor_bridge:
* add/update type-spec for all callbacks

gen_server:
* add/update type-spec for all callbacks
* add format_status/2 callback

gen_event:
* add/update type-spec for all callbacks
* add format_status/2 callback

* dgud/tools/emacs/indent-tests:
  emacs: delimiter first in icr works
  emacs: Indent delimiter first in term elements correctly
  emacs: Indent tuple (and maps) elements as list elements
  Add emacs indention testcase

OTP-14944

Avoid

From:
{
^^element1,
^^element2
}

To:
{
^element1,
^element2
}

Split the manual testcase and run them in daily tests instead.
Easy to run directly as well:
(cd ../test; cerl -eval "emacs_SUITE:indent([])")