Merge branch 'ja/doc-status-types-and-copies'

A few kinds of changes "git status" can show were not documented.

* ja/doc-status-types-and-copies:
  Documentation/git-status: mention how to detect copies
  Documentation/git-status: document porcelain status T (typechange)
  Documentation/diff-format: state in which cases porcelain status is T
  Documentation/git-status: remove impossible porcelain status DR and DC

diff --cc Documentation/git-status.txt
Simple merge