master updated (d0a66f3e0e -> 3e4e779fb1)

[Stefan Kangas]

skangas pushed a change to branch master.

      from  d0a66f3e0e Display a warning for some uses of nil in face 
attributes.
      adds  89695bce3e Clarify the doc string of 'set-face-attribute'
      adds  917da2641e Minor doc fix; improve sorting of VC backends
       new  e96acb1007 Merge from origin/emacs-28
      adds  80c5327195 Make some versions in docs match package version
       new  3e4e779fb1 ; Merge from origin/emacs-28


Summary of changes:
 doc/emacs/maintaining.texi | 48 +++++++++++++++++++++++-----------------------
 lisp/faces.el              | 37 ++++++++++++++++++++---------------
 2 files changed, 46 insertions(+), 39 deletions(-)