Merge from origin/emacs-25

71fb0e0 Improve last change to vc-git-mode-line-string
6858e77 Todo mode doc bug fix
e55d0db Fix revision calculation in vc-git-mode-line-string
ca87b34 ; Fix errant revert ccb75d7
40bfebe Add Python 3.5 keyword "await"
fa7886a Add new keywords of Python 3.5
ccb75d7 Partially revert previous change.
8ee168a ; * etc/NEWS: Update entry about color fonts on OS X with a w...
b09ca27 Say why text-quoting-style is not a user option

diff --cc etc/NEWS
Simple merge

diff --cc lisp/rect.el
Simple merge

diff --cc lisp/vc/vc-git.el
Simple merge