tools/verifygitlog.py: Show required format regexp in error message.
tools/verifygitlog.py: Show required format regexp in error message.

Signed-off-by: iTitou <81bb7a88fd1af9ab7737b57a05fcea21cbba66b8@gmail.com>

henriknelson/micropython,adafruit/circuitpython,henriknelson/micropython,bvernoux/micropython,adafruit/circuitpython,bvernoux/micropython,adafruit/circuitpython,henriknelson/micropython,bvernoux/micropython,henriknelson/micropython,adafruit/circuitpython,adafruit/circuitpython,adafruit/circuitpython,bvernoux/micropython,bvernoux/micropython,henriknelson/micropython