DOCS-11970: pass in just value to convertShardKeyToHashed

Author: kay-kim

source/reference/method/convertShardKeyToHashed.txt

@@ -13,7 +13,7 @@ convertShardKeyToHashed
 Description
 -----------
 
-.. method:: convertShardKeyToHashed(<document>)
+.. method:: convertShardKeyToHashed(<Object>)
 
    Returns the hashed value for the input. The
    :method:`convertShardKeyToHashed()` method uses the same hashing
@@ -52,7 +52,7 @@ document across the shards, you can use the
 
 .. code-block:: javascript
 
-   convertShardKeyToHashed( { _id: ObjectId("5b2be413c06d924ab26ff9ca") } )
+   convertShardKeyToHashed( ObjectId("5b2be413c06d924ab26ff9ca") )
 
 .. [#populated]