Merge from origin/emacs-27

4e6104ea0b ; * src/xdisp.c (display_string): Fix a typo in a comment.
7162228815 Improve indexing of check-declare
d218b28ab5 ; * lisp/autoinsert.el (auto-insert-alist): Fix texinfo URL.

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

diff --cc lisp/autoinsert.el
Simple merge

diff --cc src/xdisp.c
Simple merge