[committed] libstdc++: Reformat Python code

[Romain GEISSLER]

> Le 13 nov. 2023 à 16:24, Jonathan Wakely <jwakely@redhat.com> a écrit :
> 
> Yes, I'll do that backport (and most of the other Python improvements
> too, at least for gcc-13).
> 
> Thanks for raising it.
> 

Cool thanks ! ;)

In the meantime, in my own toolchains I have silenced (without fixing it) the warnings
with this simple patch (in case anyone else wants to quickly get rid of it, but it’s not
really a good long term workaround).

--- libstdc++-v3/python/libstdcxx/v6/__init__.py
+++ libstdc++-v3/python/libstdcxx/v6/__init__.py
@@ -1 +1,2 @@
-
+import warnings
+warnings.filterwarnings("ignore", category=SyntaxWarning)