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bzrlib/commands.py
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        if self.__doc__ == Command.__doc__:
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            warn("No help message set for %r" % self)
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    def get_see_also(self):
 
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        """Return a list of help topics that are related to this ommand.
 
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        The list is derived from the content of the _see_also attribute. Any
 
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        duplicates are removed and the result is in lexical order.
 
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        :return: A list of help topics.
 
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        """
 
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        return sorted(set(getattr(self, '_see_also', [])))
 
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    def options(self):
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        """Return dict of valid options for this command.
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