master updated (523821ed04 -> f372afef20)

[Lars Ingebrigtsen]

larsi pushed a change to branch master.

      from  523821ed04 Improve display of advices on build failures.
       new  127ab231be Attempt to clarify Input Focus documentation
       new  f372afef20 Tweak how use-region-p works with 
`use-empty-active-region'


Summary of changes:
 doc/lispref/frames.texi | 30 +++++++++++++++++++-----------
 lisp/simple.el          | 11 +++++++++--
 2 files changed, 28 insertions(+), 13 deletions(-)