The current master references simplenote.py @ d71dd84daeb05857f0403b412b8cb1a8d6bc076d, which appears to have been rewritten to 6d0610875add4af3a295ed1649d5a4b5b8e5ce41.
Thank you VERY much for spotting this. Turns out I'd mucked it up even
more than this so some further corrections were required (I had to
retag simplenote.py which then meant a further update to the
submodule).
The current master references simplenote.py @ d71dd84daeb05857f0403b412b8cb1a8d6bc076d, which appears to have been rewritten to 6d0610875add4af3a295ed1649d5a4b5b8e5ce41.
I have attempted to fix that.