convert shebang lines: python -> python3
diff --git a/Lib/test/test_dbm.py b/Lib/test/test_dbm.py
index 78357a0..c1be7d9 100644
--- a/Lib/test/test_dbm.py
+++ b/Lib/test/test_dbm.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Test script for the dbm.open function based on testdumbdbm.py"""
 
 import os