Pythontex Calls Weave.jl with outdated doctype

[tawheeler]

This line calls Weave.jl for juliaconsole output with the doctype "tex". That doctype is no longer supported. The tex options as far as I can tell are now "texminted" and "md2tex".

[tawheeler]

There appears to be a sister bug in Weave: #391