Using ignore_exception with until_asserted raising an AttributionError

[rockem]

Current behaviour

When using ignore_exception() feature with until_asserted, we get this error:

Traceback (most recent call last):
  File "/Users/elisegal/Source/busypie/tests/spike.py", line 14, in <module>
    wait().ignore_exceptions(ZeroDivisionError).at_most(100, MILLISECOND).until_asserted(_failed_assertion)
  File "/Users/elisegal/Source/busypie/busypie/condition.py", line 70, in until_asserted
    self._condition.append_exception(AssertionError)
  File "/Users/elisegal/Source/busypie/busypie/condition.py", line 98, in append_exception
    self.ignored_exceptions.append(exception)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'tuple' object has no attribute 'append'

Expected behaviour

ignore_exceptions should work the same as with until & during