convert shebang lines: python -> python3
diff --git a/Lib/platform.py b/Lib/platform.py
index b6e7596..7d39250 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 """ This module tries to retrieve as much platform-identifying data as
     possible. It makes this information available via function APIs.