Merge branch 'jc/codingstyle-compare-with-null'

Doc update. * jc/codingstyle-compare-with-null: CodingGuidelines: do not ==/!= compare with 0 or '\0' or NULL

Junio C Hamano committed May 14, 2020 at 14:39 UTC 73d9f96b4790e16335a30380f97d46bd065dc07b

No changes.