my $edgename_ac= join ' .. ', @$edge_ac;
printf DEBUG "spr %s edge %s\n", $what, $edgename_ac;
my $w_ac= $g->get_edge_weight(@$edge_ac);
my $edgename_ac= join ' .. ', @$edge_ac;
printf DEBUG "spr %s edge %s\n", $what, $edgename_ac;
my $w_ac= $g->get_edge_weight(@$edge_ac);