Update comment

theano/tensor/type.py

@@ -204,8 +204,8 @@ class TensorType(Type):
         Convert a symbolic Variable into a TensorType, if compatible.
 
         For the moment, only a TensorType or CudaNdarrayType will be
-        converted, provided they have the same number of dimensions,
-        broadcastable pattern, and dtype.
+        converted, provided they have the same number of dimensions and
+        dtype and have "compatible" broadcastable pattern.
 
         """
         if hasattr(other, '_as_TensorVariable'):