Code review comment for lp:~mandel/ubuntuone-dev-tools/squid-errors

77 + ex = self.assertRaises(squid.SquidLaunchError,
78 + self.runner.start_service)

In the diff, this second line is spaced over very far to the right. Why is that?

12 + msg = 'Could not start squid: %s, %s' % (output, err)

I don't think this formatting is correct. As stdout and stderr may contain multiple lines, this formatting will reduce readability slightly. I think you should do "\n%s\n%s" instead of "%s, %s" here.