stop mixing Symbol and Function in tests
Sympy used to implicitly cast Symbol to Function but stopped in v1.10. Our tests (but not code) relied on the casting behavior, and here we fix this ambiguity.
Closes #415 (closed)
Sympy used to implicitly cast Symbol to Function but stopped in v1.10. Our tests (but not code) relied on the casting behavior, and here we fix this ambiguity.
Closes #415 (closed)