cpython

Merge branch 'master' of github.com:python/cpython

bpo-19270: Fixed sched.scheduler.cancel to cancel correct event (GH-22729)

bpo-40484: Document compiler flags under AST module (GH-19885)

bpo-40492: Fix --outfile with relative path when the program changes it working dir (GH-19910)

bpo-28660: Make TextWrapper break long words on hyphens (GH-22721)