DOC: minor modifs
DOC: minor modifs

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Former-commit-id: 7666803ceb72f8bbe8860e06409de7765a230ce1
Former-commit-id: db96bca754d127febb1fe57cdcdf873e0f61f357
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox