Issue #22546: update doc for mini-language float None presentation type.
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index e5bab68..f9da5fa 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -478,10 +478,12 @@
| ``'%'`` | Percentage. Multiplies the number by 100 and displays |
| | in fixed (``'f'``) format, followed by a percent sign. |
+---------+----------------------------------------------------------+
- | None | Similar to ``'g'``, except with at least one digit past |
- | | the decimal point and a default precision of 12. This is |
- | | intended to match :func:`str`, except you can add the |
- | | other format modifiers. |
+ | None | Similar to ``'g'``, except that fixed-point notation, |
+ | | when used, has at least one digit past the decimal point.|
+ | | The default precision is as high as needed to represent |
+ | | the particular value. The overall effect is to match the |
+ | | output of :func:`str` as altered by the other format |
+ | | modifiers. |
+---------+----------------------------------------------------------+