master updated (3add626f140 -> 54d3de64e19)

[Stefan Monnier]

monnier pushed a change to branch master.

      from  3add626f140 Update from Gnulib by running admin/merge-gnulib
      adds  ee2a8fd4cff (mouse-wheel-*-event): Minor cleanups
      adds  a764b503e12 (mwheel--is-dir-p): New macro to reduce code duplication
       new  eb779ae6467 * lisp/keymap.el (define-keymap): Demote "duplicate 
def" to a warning
       new  82f71e106af * lisp/completion-preview.el: Fix use in non-GUI session
       new  db8890b3c96 mwheel.el: Unconditionally use the `wheel-up/down/...` 
events
       new  18294854c71 mwheel.el: Remove `mouse-wheel-*-alternate-event` vars
       new  998667f9026 mwheel.el: Code clean to reduce duplication
       new  54d3de64e19 Merge branch 'mwheel-no-alts'


Summary of changes:
 doc/lispref/commands.texi  |  29 ++++----
 etc/NEWS                   |   7 ++
 lisp/completion-preview.el |  16 ++---
 lisp/edmacro.el            |  16 ++---
 lisp/keymap.el             |  12 +++-
 lisp/mwheel.el             | 166 ++++++++++++++++-----------------------------
 test/src/keymap-tests.el   |  17 +++--
 7 files changed, 119 insertions(+), 144 deletions(-)