Merge pull request #1105 from ramiro/patch-1

Add missing callback arg in jobs topic example.

docs/topics/jobs.rst

@@ -90,7 +90,7 @@ But this will::
 
     def some_callback(self, response):
         somearg = 'test'
-        return scrapy.Request('http://www.example.com', meta={'somearg': somearg})
+        return scrapy.Request('http://www.example.com', callback=self.other_callback, meta={'somearg': somearg})
 
     def other_callback(self, response):
         somearg = response.meta['somearg']