Merge branch 'js/contributor-docs-updates'

Merge branch 'js/contributor-docs-updates'

Doc update.

* js/contributor-docs-updates:
  SubmittingPatches: hyphenate non-ASCII
  SubmittingPatches: clarify GitHub artifact format
  SubmittingPatches: clarify GitHub visual
  SubmittingPatches: provide tag naming advice
  SubmittingPatches: update extra tags list
  SubmittingPatches: discourage new trailers
  SubmittingPatches: drop ref to "What's in git.git"
  CodingGuidelines: write punctuation marks
  CodingGuidelines: move period inside parentheses