Graph formatting in LaTeX mode is not occurring from doctest #1767
Description
Description
The graphs from the Graph module, such as for StarGraph no longer appear in the LaTeX PDF.
Tracking what is going wrong, it appears that docpipeline in running:
$ MATHICS_CHARACTER_ENCODING="UTF-8" python mathics/docpipeline.py --output --keep-going --load-module pymathics.graph
the format_graph() routine is not getting called for `form="latex".
How to Reproduce and Output Given
Build PDF, or just the LaTeX documentation.tex look for a built-in that produces a tree graph, like StarGraph, and notice there is no test output.
Priority
We can't release until this is fixed.
Additional context
A lot has changed in the way formatting is done. Also, I recall there was "duplicate code" removed, I think, in the area around how Graphs are handled. I can't find where that was, though.