[issue33817] PyString_FromFormatV() fails to build empty strings

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


----------
pull_requests: +11082, 11083, 11084

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33817>
_______________________________________