white space fix.

doc/tutorial/aliasing.txt

@@ -156,7 +156,7 @@ This is primarily for internal debugging, not for typical use.
 
 For the transparent use of different type of optimization Theano can make,
 there is the policy that get_value() always return by default the same object type
-it received when the shared variable was created. So if you created manually data on 
+it received when the shared variable was created. So if you created manually data on
 the gpu and create a shared variable on the gpu with this data, get_value will always
 return gpu data event when return_internal_type=False.