Merge from origin/emacs-29

3b791ebbe17 ; Fix 'usage:' keyword in Ffile_name_concat doc.
ed48b0d657c ; * CONTRIBUTE: Ask not to use non-ASCII unless necessary.
b708e639d63 ; * src/lread.c (maybe_swap_for_eln): Clarify warning mes...
db027a06976 ; Fix bibtex-biblatex-field-alist docstring typo.
a9be5c7ea92 ; * doc/lispref/control.texi (Conditionals): Add missing ...
db5915f30ba Fix 'with-sqlite-transaction'
fe491173e8f ; * doc/emacs/files.texi (Image Mode): Fix typo (bug#69671).

diff --cc CONTRIBUTE
Simple merge

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

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

diff --cc lisp/textmodes/bibtex.el
Simple merge

diff --cc src/fileio.c
Simple merge

diff --cc src/lread.c
Simple merge