Commit bb23f79129470dfdb7f447b096bde7f4d5a78a88
2016-12-04T18:09:33
md_build_img_alt: Fix crash when dealing with some mark types. For some mark types, it is possible that subsequent mark has lower 'beg' then 'end' of the previous one. This typically happens when an opener mark is expanded to cover whole range to the closer.