safe_url_string can raise UnicodeError #62
Description
A similar issue was fixed in scrapy 1.1.1: scrapy/scrapy#2038, but it is still a problem in w3lib.url.safe_url_string.
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A similar issue was fixed in scrapy 1.1.1: scrapy/scrapy#2038, but it is still a problem in w3lib.url.safe_url_string.