convert shebang lines: python -> python3
diff --git a/Lib/quopri.py b/Lib/quopri.py
index ff27923..3d0f0ac 100755
--- a/Lib/quopri.py
+++ b/Lib/quopri.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """Conversions to/from quoted-printable transport encoding as per RFC 1521."""