Subscript numeric range fails inside an index list

[ToddFincannonEI]

Subscript ranges can include a numeric range that abbreviates a sequence of subscript indices as in the ref sample model.

Target: (t1-t3)

The code generator only handles this when the numeric range is the entire subscript definition as shown above. It fails when the numeric range occurs inside a subscript index list like this:

DimC: C1, (C2-C4), C5
t[DimC] = 1

Fixing this will require an antlr4-vensim grammar change and corresponding support in the code generator.