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for cmd in ['--help', 'help', '-h', '-?']:
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output = self.runbzr(cmd)[0]
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line1 = output.split('\n')[0]
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self.fail("bad output from bzr %s:\n%r" % (cmd, output))
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# see https://launchpad.net/products/bzr/+bug/35940, -h doesn't work