patch 8.1.2313: debugging where a delay comes from is not easy

Problem:    Debugging where a delay comes from is not easy.
Solution:   Use different values when calling ui_delay().
diff --git a/src/insexpand.c b/src/insexpand.c
index e42819a..121e6ec 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -304,7 +304,7 @@
 #ifdef FEAT_EVAL
 	    if (!get_vim_var_nr(VV_TESTING))
 #endif
-		ui_delay(2000L, FALSE);
+		ui_delay(2004L, FALSE);
 	}
 	return FALSE;
     }