DOC: better visualisation of output for batch_processing
DOC: better visualisation of output for batch_processing

Former-commit-id: 5c147eb8f17659953330ede330fe83a18a6d5bfc
Former-commit-id: d9c57222bcdcd8f9b31361b795c396a9b97f0a3b
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox