From 101580949868b3ca692c3ebad6e6f15782dcba12 Mon Sep 17 00:00:00 2001
From: Dima Burmistrov <pyctrl.dev@gmail.com>
Date: Sat, 19 Apr 2025 21:08:08 +0400
Subject: [PATCH 1/2] gh-150626: Update Format String Syntax documentation

---
 Doc/library/string.rst | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index be968a3c53d8430..85389c57ab38640 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -219,10 +219,11 @@ The grammar for a replacement field is as follows:
 .. productionlist:: format-string
    replacement_field: "{" [`field_name`] ["!" `conversion`] [":" `format_spec`] "}"
    field_name: `arg_name` ("." `attribute_name` | "[" `element_index` "]")*
-   arg_name: [`~python-grammar:identifier` | `~python-grammar:digit`+]
-   attribute_name: `~python-grammar:identifier`
-   element_index: `~python-grammar:digit`+ | `index_string`
+   arg_name: [`decimal_number` | `attribute_name`]
+   attribute_name: <any source character except "{", "}", "[", ".", "!", or ":"> +
+   element_index: `decimal_number` | `index_string`
    index_string: <any source character except "]"> +
+   decimal_number: <a string of one or more Unicode decimal digit characters>
    conversion: "r" | "s" | "a"
    format_spec: `format-spec:format_spec`
 

From fbda536879d5642d8267cd87310562a7ebe9904a Mon Sep 17 00:00:00 2001
From: Dima Burmistrov <122686468+pyctrl@users.noreply.github.com>
Date: Wed, 24 Jun 2026 00:19:34 +0400
Subject: [PATCH 2/2] Update Doc/library/string.rst

Co-authored-by: Robsdedude <dev@rouvenbauer.de>
---
 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 85389c57ab38640..8622e8567f37410 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -223,7 +223,7 @@ The grammar for a replacement field is as follows:
    attribute_name: <any source character except "{", "}", "[", ".", "!", or ":"> +
    element_index: `decimal_number` | `index_string`
    index_string: <any source character except "]"> +
-   decimal_number: <a string of one or more Unicode decimal digit characters>
+   decimal_number: <any Unicode decimal digit character> +
    conversion: "r" | "s" | "a"
    format_spec: `format-spec:format_spec`