* lisp/simple.el (set-mark): Ensure mark-active is nil if the mark is nil.
authorStefan Monnier <monnier@iro.umontreal.ca>
Tue, 11 Mar 2014 17:10:07 +0000 (13:10 -0400)
committerStefan Monnier <monnier@iro.umontreal.ca>
Tue, 11 Mar 2014 17:10:07 +0000 (13:10 -0400)
Deactivate the mark before setting it to nil.
(activate-mark): Do nothing if region is already active.

Fixes: debbugs:16975


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