Fix formatting error in docs.

Signed-off-by: Edward Z. Yang <ezyang@fb.com>
diff --git a/docs/source/sparse.rst b/docs/source/sparse.rst
index 8ddb16f..31a87f2 100644
--- a/docs/source/sparse.rst
+++ b/docs/source/sparse.rst
@@ -21,7 +21,6 @@
     >>> i = torch.LongTensor([[0, 1], [2, 0]])
     >>> v = torch.FloatTensor([3, 4])
     >>> torch.sparse.FloatTensor(i, v, torch.Size([2,3])).to_dense()
-
      0  0  3
      4  0  0
     [torch.FloatTensor of size 2x2]
@@ -32,7 +31,6 @@
     >>> i = torch.LongTensor([[2, 4]])
     >>> v = torch.FloatTensor([[1, 3], [5, 7]])
     >>> torch.sparse.FloatTensor(i, v).to_dense()
-
      0  0
      0  0
      1  3