Define the independent variable in the motor test#483

ChrisRackauckas merged 2 commits into

SciML:mainSciML/ModelingToolkitStandardLibrary.jl:mainfrom

ChrisRackauckas-Claude:agent/fix-downgrade-dynamicquantitiesChrisRackauckas-Claude/ModelingToolkitStandardLibrary.jl:agent/fix-downgrade-dynamicquantitiesCopy head branch name to clipboard