OPT: msct_parser : changed the length and pad for the description lines (Fixed issue #271)
OPT: msct_parser : changed the length and pad for the description lines (Fixed issue #271)

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox