`@"= \, -1"` parses but throws on display

[charlesroddie]

@"= \, -1" parses (CSharpMath.Atom.LaTeXParser.MathListFromLaTeX) but throws on display.

CSharpMath.Structures.InvalidCodePathException: Invalid space between Relation and Binary Operator

[charlesroddie]

A code search leads to https://github.com/verybadcat/CSharpMath/blob/a7e11bae0e5f37d0de61d2442c72f270522de3cb/CSharpMath/Display/InterElementSpaces.cs but this code isn't intelligible to me.

[Happypig375]

Right. This was refactored a little bit but much of the logic is from iosMath which I never understood.

[Happypig375]

I think this is related to MathList pre-processing in the Typesetter. The first = is supposed to become UnaryOperator then Ordinary in pre-processing.