Update comments for output to "<model_name?_states.sto"
Update comments for output to "<model_name?_states.sto"

[ci skip]
opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core