convert shebang lines: python -> python3
diff --git a/Tools/modulator/Tkextra.py b/Tools/modulator/Tkextra.py
index b1051aa..e969dde 100755
--- a/Tools/modulator/Tkextra.py
+++ b/Tools/modulator/Tkextra.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
# A Python function that generates dialog boxes with a text message,
# optional bitmap, and any number of buttons.
diff --git a/Tools/modulator/modulator.py b/Tools/modulator/modulator.py
index d719649..76a7224 100755
--- a/Tools/modulator/modulator.py
+++ b/Tools/modulator/modulator.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
#
# Modulator - Generate skeleton modules.
#