I just used the latest cookiecutter to start on a library, and noticed the copyright lines include both the 2017 copyright and the generated one:, e.g.:

# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
# SPDX-FileCopyrightText: Copyright (c) 2021 Dan Halbert for Adafruit Industries

Is this deliberate? I removed the first line, which appeared in several files.