docs: Add warning to torch.repeat() (pytorch#8116)

* docs: Add warning to torch.repeat()

closes pytorch#7993

* docs: Add links for numpy functions

* docs: Break the too long line

torch/_tensor_docs.py

@@ -1558,6 +1558,13 @@ def callable(a, b) -> number
 
 Unlike :meth:`~Tensor.expand`, this function copies the tensor's data.
 
+.. warning::
+
+    :func:`torch.repeat` behaves differently from
+    `numpy.repeat <https://docs.scipy.org/doc/numpy/reference/generated/numpy.repeat.html>`_,
+    but is more similar to
+    `numpy.tile <https://docs.scipy.org/doc/numpy/reference/generated/numpy.tile.html>`_.
+
 Args:
     sizes (torch.Size or int...): The number of times to repeat this tensor along each
         dimension