tweak header line in tog tree view
diff --git a/tog/tog.c b/tog/tog.c
index d5ade28..4c0093a 100644
--- a/tog/tog.c
+++ b/tog/tog.c
@@ -1823,7 +1823,7 @@ show_tree_view(struct got_tree_object *root, struct got_object_id *commit_id,
if (err != NULL)
goto done;
- if (asprintf(&tree_label, "tree of commit %s", commit_id_str) == -1) {
+ if (asprintf(&tree_label, "commit: %s", commit_id_str) == -1) {
err = got_error_from_errno();
goto done;
}