master updated (28ce3bf -> f94b915)

[Eli Zaretskii]

eliz pushed a change to branch master.

      from  28ce3bf   Further fix for the search-whitespace-regexp change
       new  b4158a7   Document 'tags-apropos-additional-actions' with Xref
       new  f94b915   Doc string followup to last change.


Summary of changes:
 doc/emacs/maintaining.texi | 89 ++++++++++++++++++----------------------------
 etc/NEWS                   |  4 ++-
 lisp/progmodes/etags.el    |  7 ++--
 lisp/progmodes/xref.el     |  4 ++-
 4 files changed, 45 insertions(+), 59 deletions(-)