Merge from origin/emacs-29

5ce02c91bc1 Improve `desktop-save-mode` docstring
2f98b13ed05 ; Fix doc strings of splash-screen data structures
77f5d4d523a Fix completing-read functional REQUIRE-MATCH behavior

diff --cc lisp/desktop.el
Simple merge

diff --cc lisp/minibuffer.el
Simple merge

diff --cc lisp/startup.el
Simple merge