From fef4391c88f3b620155a300ff27caff947547582 Mon Sep 17 00:00:00 2001
From: "Eric V. Smith" <eric@trueblade.com>
Date: Fri, 9 Sep 2016 23:12:02 -0400
Subject: Improved ',' and '_' specification in format mini-language.

---
 Doc/library/string.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index b5d5ed1..667f932 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -300,11 +300,12 @@ non-empty format string typically modifies the result.
 The general form of a *standard format specifier* is:
 
 .. productionlist:: sf
-   format_spec: [[`fill`]`align`][`sign`][#][0][`width`][,][_][.`precision`][`type`]
+   format_spec: [[`fill`]`align`][`sign`][#][0][`width`][`option`][.`precision`][`type`]
    fill: <any character>
    align: "<" | ">" | "=" | "^"
    sign: "+" | "-" | " "
    width: `integer`
+   option: "_" | ","
    precision: `integer`
    type: "b" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" | "n" | "o" | "s" | "x" | "X" | "%"
 
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