REF: register_to_template: verbose passed to sub-function straighten_spinalcord
REF: register_to_template: verbose passed to sub-function straighten_spinalcord

Former-commit-id: a30fcd890db1b936efde1c92c8a8bcb66d0bed7a
Former-commit-id: a4b000b48a25f66263b57ae98baa579d53df6784
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox