Merge from origin/emacs-29

c494a6e879d Improve documentation of 'emacs_function' in modules
a08e6423ccc ; * doc/emacs/fixit.texi (Spelling): Fix last change.
418547162d5 Improve documentation of Ispell commands
c4b49488455 Don't recommend inverse-video for debugging

diff --cc doc/emacs/fixit.texi
Simple merge

diff --cc doc/lispref/internals.texi
Simple merge

diff --cc etc/DEBUG
Simple merge