DOC: msct_multiatlas_seg: cleaned verbose
DOC: msct_multiatlas_seg: cleaned verbose

Former-commit-id: 7f0f723c0158974d5d9c7af85428772910d05b3e
Former-commit-id: 61d9421b6c2f196559401730d19d07bca3aebb8c
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox