Reformat a bit

docs/topics/extensions.rst

@@ -278,8 +278,9 @@ Default: ``0``
 
 An integer which specifies a number of items. If the spider scrapes more than
 that amount and those items are passed by the item pipeline, the
-spider will be closed with the reason ``closespider_itemcount``, requests which 
-are currently in the downloader queue (up to CONCURRENT_REQUEST requests) are still processed. 
+spider will be closed with the reason ``closespider_itemcount``.
+Requests which  are currently in the downloader queue (up to
+:setting:`CONCURRENT_REQUEST` requests) are still processed. 
 If zero (or non set), spiders won't be closed by number of passed items.
 
 .. setting:: CLOSESPIDER_PAGECOUNT