synthio: put license notice on copied files

jepler · jepler · commit b33c9f6b4b0a · 2023-05-03T09:37:12.000-05:00
diff --git a/tests/circuitpython-manual/synthio/wave/audioop.py b/tests/circuitpython-manual/synthio/wave/audioop.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
+#
+# SPDX-License-Identifier: PSF-2.0
+
 import struct
 
 
diff --git a/tests/circuitpython-manual/synthio/wave/chunk.py b/tests/circuitpython-manual/synthio/wave/chunk.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
+#
+# SPDX-License-Identifier: PSF-2.0
+
 """Simple class to read IFF chunks.
 
 An IFF chunk (used in formats such as AIFF, TIFF, RMFF (RealMedia File
diff --git a/tests/circuitpython-manual/synthio/wave/wave.py b/tests/circuitpython-manual/synthio/wave/wave.py
@@ -1,3 +1,7 @@
+# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
+#
+# SPDX-License-Identifier: PSF-2.0
+
 """Stuff to parse WAVE files.
 
 Usage.
