title: Strip \n \t \r in scrapy
body: <p>I'm trying to strip \r \n \t characters with a scrapy spider, making then a json file.</p>
  
  <p>I have a "description" object which is full of new lines, and it doesn't do what I want: matching each description to a title.</p>
  
  <p>I tried with map(unicode.strip()) but it doesn't really works. Being new to scrapy I don't know if there's another simpler way or how map unicode really works.</p>
  
  <p>This is my code:</p>
  
  <pre><code>def parse(self, response):
      for sel in response.xpath('//div[@class="d-grid-main"]'):
          item = xItem()
          item['TITLE'] = sel.xpath('xpath').extract()
          item['DESCRIPTION'] = map(unicode.strip, sel.xpath('//p[@class="class-name"]/text()').extract())
  </code></pre>
  
  <p>I tried also with:</p>
  
  <pre><code>item['DESCRIPTION'] = str(sel.xpath('//p[@class="class-name"]/text()').extract()).strip()
  </code></pre>
  
  <p>But it raised an error. What's the best way?</p>