Noticed by Andrew Stacey
Reported by Andrew Stacey.
Web#files_path and Web#blatex_pngs_path now return Pathname objects. Based on JHerdman's 5d1e8f420b but requires several other changes to the code (which assumed a string). Also, test for itex2MML 1.3.10 (you should update that too).
5d1e8f420b