master updated (8419011ceb -> 22a9a20513)

[Stefan Kangas]

skangas pushed a change to branch master.

      from  8419011ceb Translate buttons when sending XI2 motion events to 
xwidgets
      adds  06dcd2be5d Improve rectangle-mark-mode documentation regarding mark 
activation
       new  22a9a20513 Merge from origin/emacs-28


Summary of changes:
 doc/emacs/killing.texi | 16 +++++++++++-----
 lisp/rect.el           |  3 ++-
 2 files changed, 13 insertions(+), 6 deletions(-)