Repair OpenSCAD range semantics across AST construction, rendering, round-trip parsing, and serialization.

Repair OpenSCAD range semantics across AST construction, rendering, round-trip parsing, and serialization.: a task in MiMo-V2.6-RL-harbor-terminal: MiMo-V2.6-RL Terminal (Harbor) (Harbor dataset). You are working in a frozen slice of the real openscad parser source tree at /app/vendor/openscad…