!48098 fix example docs master

Merge pull request !48098 from 冯一航/code_docs_modify_example_docs_master

mindspore/python/mindspore/ops/function/math_func.py

@@ -615,7 +615,7 @@ def positive(x):
         >>> from mindspore import dtype as mstype
         >>> x = Tensor(np.array([-5.0, 1.5, 3.0, 100.0]), mstype.float32)
         >>> print(ops.positive(x))
-        [-5.0, 1.5, 3.0, 100.0]
+        [ -5.    1.5   3.  100. ]
     """
     if not isinstance(x, (Tensor, Tensor_)):
         raise TypeError(f"For positive, the input must be a Tensor, but got {type(x)}")

mindspore/python/mindspore/ops/function/nn_func.py

@@ -3900,6 +3900,7 @@ def gaussian_nll_loss(x, target, var, full=False, eps=1e-6, reduction='mean'):
         >>> target = Tensor(arr2, mstype.float32)
         >>> output = ops.gaussian_nll_loss(x, target, var)
         >>> print(output)
+        1.4374993
 
     Reference:
         Nix, D. A. and Weigend, A. S., "Estimating the mean and variance of the