[Revert] some typing

Author: megemini

python/paddle/incubate/autograd/primapi.py

@@ -143,7 +143,7 @@ def grad(outputs, inputs, grad_outputs=None):
             >>> main_program = paddle.static.Program()
             >>> with paddle.static.program_guard(main_program, startup_program):
             ...     x = paddle.static.data('x', shape=[1], dtype='float32')
-            ...     x.stop_gradient = False
+            ...     x.stop_gradients = False
             ...     y = x * x
             ...     x_grad = paddle.incubate.autograd.grad(y, x)
             ...     paddle.incubate.autograd.prim2orig()

python/paddle/incubate/operators/graph_khop_sampler.py

@@ -80,7 +80,7 @@ def graph_khop_sampler(
             >>> colptr = paddle.to_tensor(colptr, dtype="int64")
             >>> nodes = paddle.to_tensor(nodes, dtype="int64")
 
-            >>> edge_src, edge_dst, sample_index, reindex_nodes = paddle.incubate.graph_khop_sampler.graph_khop_sampler(row, colptr, nodes, sample_sizes, False)
+            >>> edge_src, edge_dst, sample_index, reindex_nodes = paddle.incubate.graph_khop_sampler(row, colptr, nodes, sample_sizes, False)
 
     """