Innards: Improve mktree_in_ud_from_only_subdir message

When it finds multiple subdirs, print them.

1 files changed, 1 insertions, 1 deletions

diff --git a/dgit b/dgit
index 1007d81..f46e55a 100755
--- a/dgit
+++ b/dgit
@@ -1259,7 +1259,7 @@ sub remove_stray_gits () {
 sub mktree_in_ud_from_only_subdir () {
     # changes into the subdir
     my (@dirs) = <*/.>;
-    die unless @dirs==1;
+    die "@dirs ?" unless @dirs==1;
     $dirs[0] =~ m#^([^/]+)/\.$# or die;
     my $dir = $1;
     changedir $dir;