Update PEP 515: the "_" format specifier is now accepted.

pep-0515.txt

@@ -83,6 +83,20 @@ the following constructors:
 - ``complex()``
 - ``Decimal()``
 
+Further changes
+---------------
+
+The new-style number-to-string formatting language will be extended to
+allow ``_`` as a thousands separator, where currently only ``,`` is
+supported.  This can be used to easily generate code with more
+readable literals.  [11]_
+
+The syntax would be the same as for the comma, e.g. ``{:10_}`` for a
+width of 10 with ``_`` separator.
+
+For the ``b``, ``x`` and ``o`` format specifiers, ``_`` will be
+allowed and group by 4 digits.
+
 
 Prior Art
 =========
@@ -149,15 +163,6 @@ introduce ambiguity with user-defined literals), which is not
 considered because of the use in Python's string literals. [1]_
 
 
-Open Proposals
-==============
-
-It has been proposed [11]_ to extend the number-to-string formatting
-language to allow ``_`` as a thousans separator, where currently only
-``,`` is supported.  This could be used to easily generate code with
-more readable literals.
-
-
 Implementation
 ==============