REF: remove flag -a (already in -param). Fix #637
REF: remove flag -a (already in -param). Fix #637

Former-commit-id: 4ca71212c19abf8dcd2d96c1051eab39098aad03 [formerly 00c3a53e08930e63ef87722e743bb221a9c9eefc]
Former-commit-id: 01bf6d48ebd36030a58011d357ed96145dbb4702
Former-commit-id: 7422b31df23d0e3b8e2c24da0d6606c4148a7e38
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox