INST: install_sct: minor modif
INST: install_sct: minor modif

Former-commit-id: f90b2a9f91c0648e6226ae0692722fbbe5a5876a [formerly d978223e03f15af94d0ba980bb41e580c2546bac]
Former-commit-id: ecad5e3cbf7b405072a8ef1543060b71ab737ab8
Former-commit-id: 69d7a395ee6da6da539437ac742a73d9788a310f
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox