Merge branch 'jc/builtin-n-tar-tree' into next

* jc/builtin-n-tar-tree:
Builtin git-diff-files, git-diff-index, git-diff-stages, and git-diff-tree.
Builtin git-show-branch.
Builtin git-apply.
Builtin git-commit-tree.
Builtin git-read-tree.
Builtin git-tar-tree.
Builtin git-ls-tree.
Builtin git-ls-files.