--- a/testoutput.c	Thu Feb 12 02:18:24 2009 -0500
+++ b/testoutput.c	Thu Feb 12 02:37:59 2009 -0500
@@ -22,7 +22,8 @@
         int i;
         for (i = 0; i < pd->error_count; i++)
         {
-            printf("ERROR: (line %d) %s\n",
+            printf("%s:%d: ERROR: %s\n",
+                    pd->errors[i].filename ? pd->errors[i].filename : "???",
                     pd->errors[i].error_position,
                     pd->errors[i].error);
         } // for