Reverted save_gpf testing to numpy array almost equals

plio/io/tests/test_io_bae.py

@@ -85,7 +85,7 @@ def test_write_gpf(gpf, file):
     truth_arr = np.genfromtxt(gpf, skip_header=3)
     test_arr = np.genfromtxt(file, skip_header=3)
 
-    assert (truth_arr==test_arr).all()
+    np.testing.assert_array_almost_equal(truth_arr, test_arr)
 
     # np.testing.assert_array_almost_equal(truth_arr, test_arr)