Merge remote-tracking branch 'origin/emacs-28' into trunk

diff --cc lisp/abbrev.el
Simple merge

diff --cc lisp/emacs-lisp/package.el
Simple merge

diff --cc lisp/emacs-lisp/tabulated-list.el
Simple merge

diff --cc lisp/files.el
Simple merge

diff --cc src/fns.c
Simple merge

diff --cc test/lisp/files-tests.el
Simple merge