REF: msct_smooth: minor changes
REF: msct_smooth: minor changes

Former-commit-id: b7a0dc8be3bd908b892e11ff72dffbb86498776c [formerly 1297910fef74f4c34c598d85a99edd5ab383d154]
Former-commit-id: ad095fc5cf686dc94deaef0ea79edd02b6e387b1
Former-commit-id: bd1be0239aabc23e98e645b96c1d3a2d4691a6b1
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox