Improve __repr__ for BaseDefinition and AbstractNameDefinition

jedi/evaluate/filters.py

@@ -34,9 +34,11 @@ class AbstractNameDefinition(object):
         return self.parent_context.get_root_context()
 
     def __repr__(self):
-        if self.start_pos is None:
-            return '<%s: %s>' % (self.__class__.__name__, self.string_name)
-        return '<%s: %s@%s>' % (self.__class__.__name__, self.string_name, self.start_pos)
+        return '%s(string_name=%r, start_pos=%r)' % (
+            self.__class__.__name__,
+            self.string_name,
+            self.start_pos,
+        )
 
     def execute(self, arguments):
         return self.infer().execute(arguments)