BUG: register_to_template: fixed typo that prevented to set flag -cpu-nb
BUG: register_to_template: fixed typo that prevented to set flag -cpu-nb

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox