dcrochu as of 01/02/2024, plus rsigns and typo standardization

DONE mark "Cum autem... in caelum" as synthetic. End of V/ is auth.

Backported verse melody fix by dcrochu + //->/ + slight neumes adjustment on aperTOS by dcrochu

cf. pull request: https://github.com/Nocturnale-Romanum/nocturnale-romanum/pull/220