fixed tiny typo in new # format doc
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 07a2c4b..faf5fed 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -349,7 +349,7 @@
+---------+----------------------------------------------------------+
The ``'#'`` option is only valid for integers, and only for binary,
-octal, or decimal output. If present, it specifies that the output
+octal, or hexadecimal output. If present, it specifies that the output
will be prefixed by ``'0b'``, ``'0o'``, or ``'0x'``, respectively.
*width* is a decimal integer defining the minimum field width. If not