TEST: straighten: added duration
TEST: straighten: added duration

Former-commit-id: cfb776ff5027dd223dd397281811319200d53754 [formerly 4c59ca3447dadbe276568da31cec084936b7f1a2]
Former-commit-id: 63d9a9095888823aaf05be733287637a237c6702
Former-commit-id: d583664862c80231a26edec6cf44a1852c81a3a5
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox