DOC: msct_parser: now always display month and day with two digits (add 0 in front when needed)
DOC: msct_parser: now always display month and day with two digits (add 0 in front when needed)

Former-commit-id: 62acf79a153d3365af3a94a698af0a79106bf36c [formerly d37787ce5b25584a61b32b35643458cfdb0271d6]
Former-commit-id: 6027bd3683f31accd2cfc9f82599464c6a49841a
Former-commit-id: ad0784cfdf9f7ccbbac3dbdf9c42c94ed20ea4a5
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox