integrate fixes from UD
See <https://github.com/UniversalDependencies/UD_Old_French-SRCMF/compare/cf2f4ed9f5747f3a12d0a01693a36e1b1b2faa90..master>
See <https://github.com/UniversalDependencies/UD_Old_French-SRCMF/compare/cf2f4ed9f5747f3a12d0a01693a36e1b1b2faa90..master>