More test cases have been added in `test_clebsch_gordan.py`
More test cases have been added in `test_clebsch_gordan.py`

As mentioned earlier in the file, more tests cases were required to be added using the source provided in the file.
Test cases have been added in the functions `test_clebsch_gordan1()` and `test_clebsch_gordan2()`

kaushik94/sympy,kaushik94/sympy,kaushik94/sympy