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Improve documentation for spider middlewares
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@ -122,7 +122,7 @@ object gives you access, for example, to the :ref:`settings <topics-settings>`.
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method (from a previous spider middleware) raises an exception.
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:meth:`process_spider_exception` should return either ``None`` or an
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iterable of :class:`~scrapy.Request` objects and :ref:`item object
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iterable of :class:`~scrapy.Request` objects or :ref:`item object
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<topics-items>`.
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If it returns ``None``, Scrapy will continue processing this exception,
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