Unnecessary update when value is None
Unnecessary update when value is None

When value is None, it is not necessary to invoke update and run other methods and conditions to make the code complicated there.
pawelmhm/scrapy,dangra/scrapy,pablohoffman/scrapy,starrify/scrapy,pawelmhm/scrapy,elacuesta/scrapy,dangra/scrapy,scrapy/scrapy,starrify/scrapy,elacuesta/scrapy,pablohoffman/scrapy,starrify/scrapy,scrapy/scrapy,pawelmhm/scrapy,dangra/scrapy,pablohoffman/scrapy,elacuesta/scrapy,scrapy/scrapy