[3.6] bpo-39234: enum.auto() default initial value as 1 (GH-17878)

Updated as Eric mentioned "By default, the initial value starts at 1"

https://bugs.python.org/issue39234

Automerge-Triggered-By: @ericvsmith.
(cherry picked from commit 24bcefc)

Co-authored-by: YoSTEALTH <[email protected]>

Author: YoSTEALTH

Doc/library/enum.rst

@@ -55,7 +55,7 @@ helper, :class:`auto`.
 
 .. class:: auto
 
-    Instances are replaced with an appropriate value for Enum members.
+    Instances are replaced with an appropriate value for Enum members.  By default, the initial value starts at 1.
 
 .. versionadded:: 3.6  ``Flag``, ``IntFlag``, ``auto``