Fix typo.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29868 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/interfaces/crawlable.py

@@ -70,7 +70,7 @@ class ICrawlable(Interface):
   def isIndexContent(container=None, content=None):
     """
     Returns True if the content document acts as an index
-    to other documents. Returns False is the content document
+    to other documents. Returns False if the content document
     contains relevant content for the end-user. 
 
     This method is used by ERP5 crawlers to make a difference between