update Docstrings for LinearOperator

nifty/operators/linear_operator/linear_operator.py

@@ -82,6 +82,9 @@ class LinearOperator(Loggable, object):
 
     @abc.abstractproperty
     def domain(self):
+        """
+        asdff
+        """
         raise NotImplementedError
 
     @abc.abstractproperty