From 817d91829f388a0302254c71792bb6b5382fd273 Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Sun, 27 Jun 2010 10:49:23 +0000
Subject: [PATCH] Use designated syntax for optional grammar element.

---
 Doc/library/string.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 731484813a..23414dd112 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -224,7 +224,7 @@ The grammar for a replacement field is as follows:
    .. productionlist:: sf
       replacement_field: "{" [`field_name`] ["!" `conversion`] [":" `format_spec`] "}"
       field_name: arg_name ("." `attribute_name` | "[" `element_index` "]")*
-      arg_name: (`identifier` | `integer`)?
+      arg_name: [`identifier` | `integer`]
       attribute_name: `identifier`
       element_index: `integer` | `index_string`
       index_string: <any source character except "]"> +
-- 
2.40.0