Validate PEP created dates and update linters#1886

Merged

gvanrossum merged 3 commits intopython:masterfrom

CAM-Gerlach:validate-created-date-pygrep

Mar 22, 2021

Commits on Mar 21, 2021

Check created date exists & matches format, and fix non-conforming
CAM-Gerlach
committed
Automatically fix mixed EoLs on checkin and in one PEP
CAM-Gerlach
committed
Add rst-directive-colons check, fix issue it found and refine regex
CAM-Gerlach
committed