Merge branch 'kh/doc-patch-id'

"git patch-id" documentation updates.

* kh/doc-patch-id:
  doc: patch-id: --verbatim locks in --stable
  doc: patch-id: spell out the git-diff-tree(1) form
  doc: patch-id: use definite article for the result
  patch-id: use “patch ID” throughout
  doc: patch-id: capitalize Git version
  doc: patch-id: don’t use semicolon between bullet points