Include __init__ call signature in Class.doc

jedi/evaluate_representation.py

@@ -288,7 +288,8 @@ class Class(use_metaclass(cache.CachedMetaClass, pr.IsScope)):
 
     def __getattr__(self, name):
         if name not in ['start_pos', 'end_pos', 'parent', 'asserts', 'docstr',
-                'get_imports', 'get_parent_until', 'get_code', 'subscopes']:
+                'doc', 'get_imports', 'get_parent_until', 'get_code',
+                'subscopes']:
             raise AttributeError("Don't touch this: %s of %s !" % (name, self))
         return getattr(self.base, name)