bf615193ce673c29598db9bd4c316d76647b83cb musig-spec: minor fixups (Jonas Nick) Pull request description: ACKs for top commit: robot-dreams: ACK bf615193ce673c29598db9bd4c316d76647b83cb, thanks! Tree-SHA512: dff21e4f68640de6087426af934d882146f53392166fb9826bc15fc13490bbb20b4ae94410604567df451ac5875fa3cf17be5f2cc7f7d2ae135aff91b17f3754