Merge from origin/emacs-27

7ac411ae2c (origin/emacs-27) ; * src/data.c (Fcar, Fcdr): Doc fix.
0d9e1826f7 One more minor update of the Emacs manual for 19th printing
92616d30e0 ; Fix let-alist Texinfo markup
c13acf8e34 ; * doc/emacs/mule.texi (International Chars): Mention 'de...

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

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

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

diff --cc src/data.c
Simple merge