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Merge bzr.ab.integration

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bzrlib/ui/__init__.py
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        """
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        raise NotImplementedError(self.nested_progress_bar)
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    def clear_term(self):
 
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        """Prepare the terminal for output.
 
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        This will, for example, clear text progress bars, and leave the
 
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        cursor at the leftmost position."""
 
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        raise NotImplementedError(self.clear_term)
 
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class SilentUIFactory(UIFactory):
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    """A UI Factory which never prints anything.
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                klass=bzrlib.progress.DummyProgress)
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        return self._progress_bar_stack.get_nested()
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    def clear_term(self):
 
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        pass
 
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def clear_decorator(func, *args, **kwargs):
 
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    """Decorator that clears the term"""
 
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    ui_factory.clear_term()
 
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    func(*args, **kwargs)
 
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ui_factory = SilentUIFactory()
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"""IMPORTANT: never import this symbol directly. ONLY ever access it as