Often when class name is reported in stdlib (e.g. in reprs), it used together with module name: '%s.%s' % (self.__class__.__module__, self.__class__.__name__). But this code is wrong when a class is nested. The __qualname__ attribute should be used instead of just __name__ (and it is already used in multiple places).

Proposed patch replaces __name__ to __qualname__ when it used together with module name to format full class name.