DOCSP-9922 doc update for supported regex syntax (#19)

Author: kanchana-mongodb

source/reference/examples/path-syntax-examples.txt

@@ -254,7 +254,9 @@ example filename include the following fields:
 
    You must escape the regex string specified in the ``path``. For
    example, if the regex string includes double quotes, you must 
-   escape those values.
+   escape those values. {+dl+} supports the `Package Syntax 
+   <https://golang.org/pkg/regexp/syntax/>`__ for regular expressions 
+   in the storage configuration.
 
 Queries that include *all* generated fields can be targeted to only
 those files that match the specified values.

source/supported-unsupported/supported-partition-attributes.txt

@@ -10,8 +10,7 @@ Supported Partition Attribute Types
 
 The following table lists the supported data types for partition attributes 
 in the :datalakeconf:`~databases.[n].collections.[n].dataSources.[n].path` and 
-an example 
-:datalakeconf:`~databases.[n].collections.[n].dataSources.[n].path` 
+an example :datalakeconf:`~databases.[n].collections.[n].dataSources.[n].path` 
 for each data type:
 
 .. list-table::
@@ -119,4 +118,9 @@ for each data type:
 
        In the above example, ``myUuid``  is interpreted 
        as a `UUID <http://bsonspec.org/spec.html>`__ of binary subtype 4.
-       
+
+.. note:: 
+
+   {+adl+} supports the `Package Syntax 
+   <https://golang.org/pkg/regexp/syntax/>`__ for regular expressions 
+   in the path to the filename.