DOC: now display UNIX command without the ">>" for easier copy/paste (also now printed in blue)
DOC: now display UNIX command without the ">>" for easier copy/paste (also now printed in blue)

Former-commit-id: a5b1cf6240493944d2245f150b2826c57600dd9d
Former-commit-id: f162683c4bc384ba209604028c968232a30d10eb
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox