Merge from origin/emacs-27

4712c75ab8 Clarify when activate-mark-hook is run
abedf3a865 Fix language-environment and font selection on MS-Windows
8b8708eadd Fix example in Sequence Functions node in the manual

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

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

diff --cc lisp/simple.el
Simple merge

diff --cc lisp/w32-fns.el
Simple merge

diff --cc src/w32.c
Simple merge