Add space to class string of iterator objects

Fixes #419.

index.bs

@@ -4038,7 +4038,7 @@ that have [=members=] with these names.
 
         typeof SessionManager.prototype.values;            // Evaluates to "function"
         var it = sm.values();                              // values() returns an iterator object
-<!--    String(it);                                        // Evaluates to "[object SessionManagerIterator]"
+<!--    String(it);                                        // Evaluates to "[object SessionManager Iterator]"
                                                            // TODO: https://github.com/heycam/webidl/issues/419 -->
         typeof it.next;                                    // Evaluates to "function"
 
@@ -11854,7 +11854,7 @@ its index is set to 0.
 
 The [=class string=] of a [=default iterator object=] for a given [=interface=]
 is the result of concatenating the [=identifier=] of the [=interface=]
-and the string "<code>Iterator</code>".
+and the string "<code> Iterator</code>".
 
 
 <h5 id="es-iterator-prototype-object">Iterator prototype object</h5>
@@ -11918,7 +11918,7 @@ must be {{%IteratorPrototype%}}.
 
 The [=class string=] of an [=iterator prototype object=] for a given [=interface=]
 is the result of concatenating the [=identifier=] of the [=interface=]
-and the string "<code>Iterator</code>".
+and the string "<code> Iterator</code>".
 
 
 <h4 id="es-maplike">Maplike declarations</h4>