Remove a duplicate word

docs/topics/api.rst

@@ -81,8 +81,8 @@ how you :ref:`configure the downloader middlewares
         The execution engine, which coordinates the core crawling logic
         between the scheduler, downloader and spiders.
 
-        Some extension may want to access the Scrapy engine, to modify inspect
-        or modify the downloader and scheduler behaviour, although this is an
+        Some extension may want to access the Scrapy engine, to inspect  or 
+        modify the downloader and scheduler behaviour, although this is an
         advanced use and this API is not yet stable.
 
     .. attribute:: spider