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