grammar tweak

Author: Cladis

source/tutorial/analyze-query-plan.txt

@@ -102,7 +102,7 @@ To view the query plan selected, use the
   documents.
 
 - :data:`executionStats.totalDocsExamined
-  <explain.executionStats.totalDocsExamined>` display ``10`` to
+  <explain.executionStats.totalDocsExamined>` displays ``10`` to
   indicate that MongoDB had to scan ten documents (i.e. all documents
   in the collection) to find the three matching documents.