Merge from origin/emacs-28

66b8dfd060 (origin/emacs-28) ; Fix last change related to shorthands
3832b983cf In Fdelete_other_windows_internal fix new total window siz...
5deb0ec14f * lisp/mh-e/mh-show.el (mh-junk-whitelist): Custom obsoles...
cf1409db71 Don't apply shorthands to punctuation-only symbols (bug#51...
b3d0f53b29 * lisp/progmodes/python.el: Bump package version to 0.28.

diff --cc lisp/progmodes/python.el
Simple merge

diff --cc test/lisp/progmodes/elisp-mode-tests.el
Simple merge