: !length $overwrite_version ? " --overwrite"
: " --overwrite=".$overwrite_version;
+ # Contributing parent is the first parent - that makes
+ # git rev-list --first-parent DTRT.
my $pmf = dgit_privdir()."/pseudomerge";
open MC, ">", $pmf or die "$pmf $!";
print MC <<END or die $!;