(DOCSP-36307): Fix inaccuracy for index on embedded field (#6263)

* (DOCSP-36307): Fix inaccuracy for index on embedded field

* tweak

* spacing

Author: jeff-allen-mongo

source/core/indexes/index-types/index-single/create-single-field-index.txt

@@ -122,9 +122,7 @@ The following query uses the index on the ``location`` field:
 Details
 ```````
 
-When you create an index on an embedded document, only queries that
-specify the *entire* embedded document use the index. Queries on a
-specific field within the document do not use the index.
+.. include:: /includes/indexes/embedded-object-need-entire-doc.rst
 
 For example, the following queries *do not* use the index on the
 ``location`` field because they query on specific fields within the

source/includes/indexes/embedded-object-need-entire-doc.rst

@@ -0,0 +1,3 @@
+When you create an index on an embedded document, only queries that
+specify the entire embedded document use the index. Queries on a
+specific field within the document do not use the index.

source/indexes.txt

@@ -48,10 +48,15 @@ example, consider the following scenarios:
    * - A salesperson often needs to look up client information by
        location. Location is stored in an embedded object with fields
        like ``state``, ``city``, and ``zipcode``. You can create an
-       index on the entire ``location`` object to improve performance
-       for queries on any field in that object.
+       index on the ``location`` object to improve performance for
+       queries on that object.
 
-     - :ref:`Single Field Index <indexes-single-field>` on an object
+       .. note::
+
+          .. include:: /includes/indexes/embedded-object-need-entire-doc.rst
+
+     - :ref:`Single Field Index <indexes-single-field>` on an embedded
+       document
 
    * - A grocery store manager often needs to look up inventory items by
        name and quantity to determine which items are low stock. You can