MetaSwapModel object mangles path to unsat database

[luitjansl]

The MetaswapModel object takes the path to the unsa database as a constructor parameter:
MetaSwapModel(unsat_database)

But on calling "write"on the metaswap model, it renders it in an unreadable format:
in para_sim.inp it writes

unsa_svat_path = "$"D:\dev\imod_suite\imod_coupler\.imod_collector\e150_metaswap\"\"

To correct this we can re-assign the path directly to simulation_settings of the metaswap model

metamod.msw_model.simulation_settings["unsa_svat_path"] = original.msw_model.simulation_settings["unsa_svat_path"]

but this should not be necessary