# difftree output is not printed for merges
open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
@diff_opts, $parent, $hash, "--"
# difftree output is not printed for merges
open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
@diff_opts, $parent, $hash, "--"