Revisit test for PointSource call with scalar input

[israelmcmc]

I think the check should be np.isscalar(result) instead of isinstance(result, float). Or maybe check for np.floating type. This was failing for me with a numpy singleton array,.

astromodels/astromodels/tests/test_point_source.py

Line 234 in 17e0870

assert isinstance(result, float)