convert shebang lines: python -> python3
diff --git a/Tools/scripts/logmerge.py b/Tools/scripts/logmerge.py
index 06750b0..b7245f4 100755
--- a/Tools/scripts/logmerge.py
+++ b/Tools/scripts/logmerge.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """Consolidate a bunch of CVS or RCS logs read from stdin.