convert shebang lines: python -> python3
diff --git a/Tools/scripts/fixcid.py b/Tools/scripts/fixcid.py
index c9d3a29..95f7863 100755
--- a/Tools/scripts/fixcid.py
+++ b/Tools/scripts/fixcid.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 # Perform massive identifier substitution on C source files.
 # This actually tokenizes the files (to some extent) so it can