Fixed API test descriptions
Fixed API test descriptions

miaecle/deepchem,ktaneishi/deepchem,miaecle/deepchem,rbharath/deepchem,Agent007/deepchem,ktaneishi/deepchem,lilleswing/deepchem,rbharath/deepchem,ktaneishi/deepchem,lilleswing/deepchem,Agent007/deepchem,deepchem/deepchem,peastman/deepchem,miaecle/deepchem,joegomes/deepchem,joegomes/deepchem,lilleswing/deepchem,deepchem/deepchem,Agent007/deepchem,peastman/deepchem