Merge from origin/emacs-26

e97c043 Fix python.el docstring (Bug#36458)
e660801 ; Add thing-at-point-looking-at test (Bug#35708)
f5b4846 ; Fix typo, insure -> ensure in ChangeLogs
cb8fb59 * lisp/hi-lock.el (hi-lock-line-face-buffer): Doc fix.  (Bug3...

diff --cc lisp/ChangeLog.5
Simple merge

diff --cc lisp/hi-lock.el
Simple merge

diff --cc lisp/progmodes/python.el
Simple merge

diff --cc test/lisp/thingatpt-tests.el
Simple merge