updated for version 7.3.898
Problem:    Memory leak reported by valgrind in test 91.
Solution:   Only use default argument when needed.
diff --git a/src/testdir/test91.ok b/src/testdir/test91.ok
index 8777af8..6227ec7 100644
--- a/src/testdir/test91.ok
+++ b/src/testdir/test91.ok
@@ -1,13 +1,13 @@
 start:
-1234
-1234
-{'var_num': 1234}
-{'var_num': 1234}
-5678
+'1234'
+'1234'
+{'var_num': '1234'}
+{'var_num': '1234'}
+'5678'
 {}
 {}
 ''
-5678
+'5678'
 0
 0
 'Dance'