DOCS-1400 minor change to glossary

Signed-off-by: Sam Kleinman <[email protected]>

Author: Bob Grabar

source/reference/glossary.txt

@@ -769,9 +769,9 @@ Glossary
       information.
 
    namespace
-      A canonical name for a collection or index in MongoDB.
-      Namespaces consist of a concatenation of the database and
-      collection or index name, like so:
+      The canonical name for a collection or index in MongoDB.
+      The namespace is a combination of the database name and
+      the name of the collection or index, like so:
       ``[database-name].[collection-or-index-name]``. All documents
       belong to a namespace.