The path has already been stripped while parsing. This will enable prefixes that contain a `/` while attaching.
Also use `spec.meshdir` for asset paths in `spec.to_zip()`.
PiperOrigin-RevId: 794573523
Change-Id: Ic36bb641c3d72848399006cf718afd8542e91ed4
This should enable other pybind modules to accept arguments of type MjSpec.
PiperOrigin-RevId: 745580987
Change-Id: I435a8d264149369e3fbee14c5d2c628ef74b2541