commit 817d91829f388a0302254c71792bb6b5382fd273
author Georg Brandl <georg@python.org> Sun Jun 27 10:49:23 2010 +0000
committer Georg Brandl <georg@python.org> Sun Jun 27 10:49:23 2010 +0000
tree a0011120f2c425d3ec730e81dc019655683211c7
parent 565569b8dcddadb9ad1e5b8cc754119837777db7

Use designated syntax for optional grammar element.

Doc/library/string.rst

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 7314848..23414dd 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -224,7 +224,7 @@
    .. 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 "]"> +