convert shebang lines: python -> python3
diff --git a/Lib/test/test_errno.py b/Lib/test/test_errno.py
index 621335c..e7d5ce5 100755
--- a/Lib/test/test_errno.py
+++ b/Lib/test/test_errno.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Test the errno module
    Roger E. Masse
 """