Fix some en docs (#49513)

python/paddle/tensor/manipulation.py

@@ -3336,7 +3336,6 @@ def expand(x, shape, name=None):
 
     Both the number of dimensions of ``x`` and the number of elements in ``shape`` should be less than or equal to 6. And the number of dimensions of ``x`` should be less than the number of elements in ``shape``. The dimension to expand must have a value 1.
 
-
     Args:
         x (Tensor): The input Tensor, its data type is bool, float32, float64, int32 or int64.
         shape (list|tuple|Tensor): The result shape after expanding. The data type is int32. If shape is a list or tuple, all its elements

python/paddle/tensor/search.py

@@ -570,7 +570,7 @@ def where(condition, x=None, y=None, name=None):
         \end{cases}.
 
     Notes:
-        ``numpy.where(condition)`` is identical to ``paddle.nonzero(condition, as_tuple=True)``, please refer to :ref:`api_tensor_search_nonzero`.
+        ``numpy.where(condition)`` is identical to ``paddle.nonzero(condition, as_tuple=True)``, please refer to :ref:`api_paddle_nonzero`.
 
     Args:
         condition (Tensor): The condition to choose x or y. When True (nonzero), yield x, otherwise yield y.