Tiny spelling mistake fix. (#20425)

Summary:
"then the output would also has k tensors" -> "then the output would also have k tensors"
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20425

Differential Revision: D15320152

Pulled By: zou3519

fbshipit-source-id: b04e2ccd29c6a3e33ad1040d0ea975a01a7bd9b5
diff --git a/torch/functional.py b/torch/functional.py
index aeec338..690c014 100644
--- a/torch/functional.py
+++ b/torch/functional.py
@@ -270,7 +270,7 @@
 
     Returns:
         seq (sequence of Tensors): If the input has :math:`k` tensors of size
-        :math:`(N_1,), (N_2,), \ldots , (N_k,)`, then the output would also has :math:`k` tensors,
+        :math:`(N_1,), (N_2,), \ldots , (N_k,)`, then the output would also have :math:`k` tensors,
         where all tensors are of size :math:`(N_1, N_2, \ldots , N_k)`.
 
     Example::