Platforms: linux

This test was disabled because it is failing on master ([recent examples](http://torch-ci.com/failure/test_torch.py%3A%3ATestTorch%3A%3Atest_equal)).

The cause seems to point to https://github.com/pytorch/pytorch/pull/100024 (or D45282119 as it was landed internally)

cc @mruberry @houseroad @ezyang 
tensor = torch.zeros(size_result, d=d, d=d)
            index = torch.randint(0, size_result[dim], (size_source[dim],),
                                  d=torch.long, d=d)
            if d.is_floating_point or d.is_complex:
                source = torch.rand(size_source, d=d, d=d)
            elif d.is_signed:
                source = torch.randint(-2, 5, size_source, d=d, d=d)
            else:
                source = torch.randint(0, 5, size_source, d=d, d=d)
            ref_out = tensor.index_add(dim, index, source, alpha=2.) / 2.