DOC: added todo
DOC: added todo

Former-commit-id: b852f6de3e66b49b37a2fba324aafb71167c5f06
Former-commit-id: 7974c452e4a963102b54cb1833ba594a8c27d859
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox