assertError() doesn't work properly if reply.showsimplesyntax is set to True

[jlu5]

I decided to spin up a custom mod of Limnoria a while ago, with custom defaults in src/conf.py. One of these includes setting reply.showsimplesyntax to True by default, but this causes many tests to fail on assertError!

Although this isn't currently an issue in stock Limnoria (showsimplesyntax is disabled by default), a config option should not cause unrelated tests to fail.

A snippet from $ supybot-test Conditional/:

FAIL: testNne (Conditional.test.ConditionalTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/gl/.local/lib/python3.4/site-packages/supybot/test.py", line 154, in runTest
    originalRunTest()
  File "./Conditional/test.py", line 114, in testNne
    self.assertError('nne 1 2 3')
  File "/home/gl/.local/lib/python3.4/site-packages/supybot/test.py", line 282, in assertError
    '%r did not error: %s' % (query, m.args[1]))
AssertionError: False is not true : 'nne 1 2 3' did not error: nne <item1> <item2>

----------------------------------------------------------------------
Ran 17 tests in 6.474s

FAILED (failures=7)

[progval]

I don't think it's a bug, lots of tests would break with non-default configs (eg. not replying on error, replying with notices, etc.)

[jlu5]

Yeah, let's close this as wontfix since my previous use-case for this issue is no longer there.