my ($tree,$dir) = mktree_in_ud_from_only_subdir();
changedir '../../../..';
my @diffcmd = (@git, qw(diff --exit-code), $tree);
my ($tree,$dir) = mktree_in_ud_from_only_subdir();
changedir '../../../..';
my @diffcmd = (@git, qw(diff --exit-code), $tree);