prevent SystemError from happening through literal_eval

builtin.py

@@ -190,7 +190,7 @@ class Parser(CachedModule):
         def get_doc(obj, indent=False):
             doc = inspect.getdoc(obj)
             if doc:
-                doc = ('"""\n%s\n"""\n' % doc)
+                doc = ('r"""\n%s\n"""\n' % doc)
                 if indent:
                     doc = parsing.indent_block(doc)
                 return doc

parsing.py

@@ -154,6 +154,8 @@ class Scope(Simple):
     def add_docstr(self, string):
         """ Clean up a docstring """
         self.docstr = cleandoc(literal_eval(string))
+        # TODO raises a SystemError here, report:
+        #literal_eval(r"'\U'")
 
     def add_import(self, imp):
         self.imports.append(imp)