DOCS-2218: fixing broken link

Author: Sam Kleinman

source/tutorial/modify-documents.txt

@@ -26,15 +26,15 @@ with the ``multi`` option set to ``true`` to update multiple documents.
 
 The following example finds all documents with ``type`` equal to
 ``"book"`` and modifies their ``qty`` field by ``-1``. The example uses
-:update:`$inc`, which is one of the:ref:`update operators
+:update:`$inc`, which is one of the :ref:`update operators
 <update-operators>` available.
 
 .. code-block:: javascript
 
-   db.inventory.update( 
+   db.inventory.update(
                         { type : "book" },
                         { $inc : { qty : -1 } },
-                        { multi: true } 
+                        { multi: true }
                       )
 
 For more examples, see :method:`~db.collection.update()`.