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def test_help_detail(self):
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dash_h = self.run_bzr('diff -h')[0]
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help_x = self.run_bzr('help diff')[0]
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self.assertContainsRe(help_x, "Purpose:")
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self.assertContainsRe(help_x, "Usage:")
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self.assertContainsRe(help_x, "Options:")