DOCS-564 collection names: minor edits

Author: Bob Grabar

source/release-notes/2.2.txt

@@ -315,7 +315,7 @@ names can be any UTF-8 string with the following exceptions:
 
 - A collection name should begin with a letter or an underscore.
 
-- The empty string ("") is not a valid collection name.
+- The empty string (``""``) is not a valid collection name.
 
 - Collection names cannot contain the ``$`` character. (version 2.2 only)
 
@@ -349,14 +349,6 @@ driver <>`.
       db.getCollection("_foo").find()
       { "_id" : ObjectId("506dbf800f70bf70d1ca613b"), "a" : 1 }
 
-   If you were to query the ``_foo`` collection with dot notation, you
-   would receive an error, as shown here:
-
-   .. code-block:: javascript
-
-      db._foo.find()
-      Thu Oct  4 12:56:01 TypeError: db._foo has no properties (shell):1
-
 Restrictions on Database Names for Windows
 ``````````````````````````````````````````