DOC: msct_register: minor change
DOC: msct_register: minor change

Former-commit-id: 34637e119fff528236bb7d547dfd990e29212541 [formerly e8362be918d5ffa086ac379c93b65fa0521b58c8]
Former-commit-id: 3fa9c76ab7aea1e7ef1f4e185b9c4f9308d26458
Former-commit-id: b618ef4fb6a7c4316273ae92df85574f0e979ed6
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox