Merge pull request #3445 from jfflisikowski/3097-item-urls-not-defined-in-example

[MRG+1] Updating debug example file (#3097)

docs/topics/debug.rst

@@ -18,11 +18,13 @@ Consider the following scrapy spider below::
             )
 
         def parse(self, response):
-            # collect `item_urls`
+            # <processing code not shown>
+            # collect `item_urls` 
             for item_url in item_urls:
                 yield scrapy.Request(item_url, self.parse_item)
 
         def parse_item(self, response):
+            # <processing code not shown>
             item = MyItem()
             # populate `item` fields
             # and extract item_details_url