- qtbot.waitSignal with raising=True is the default this way, so we remove the
raising=True.
- qtbot.waitSignal with raising=False stay untouched
- Some qtbot.waitSignal without raising had one added (because we don't want it
to raise)
- Some qtbot.waitSignal without raising actually should've raised, which they
do now.
This was missing before, causing a (hidden) exception with Python < 3.5, and
this with 3.5:
TypeError: readData() takes 1 positional argument but 2 were given
During handling of the above exception, another exception occurred:
SystemError: PyEval_EvalFrameEx returned a result with an error set
Fixes#969.
