Updated tests for the new behaviour of SymbolicUtils simplify function#3893

ChrisRackauckas merged 1 commit intoSciML:masterSciML/ModelingToolkit.jl:masterfrom

Bumblebee00:fix_tests_for_new_simplifyBumblebee00/ModelingToolkit.jl:fix_tests_for_new_simplifyCopy head branch name to clipboard