Merge pull request #146 from gryphius/fix_doc_typo

Fix typo in ExtractingRequestHandler documentation

Thanks @gryphius

Author: acdha

pysolr.py

@@ -883,7 +883,7 @@ def extract(self, file_obj, extractOnly=True, **kwargs):
 
             http://wiki.apache.org/solr/ExtractingRequestHandler
 
-        The ExtractingRequestHandler has a very simply model: it extracts
+        The ExtractingRequestHandler has a very simple model: it extracts
         contents and metadata from the uploaded file and inserts it directly
         into the index. This is rarely useful as it allows no way to store
         additional data or otherwise customize the record. Instead, by default