convert shebang lines: python -> python3
diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py
index aee797d..72ba1ac 100644
--- a/Lib/webbrowser.py
+++ b/Lib/webbrowser.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Interfaces for launching and remotely controlling Web browsers."""
 # Maintained by Georg Brandl.