bpo-32587: Make winreg.REG_MULTI_SZ support zero-length strings (GH-13239)


* bpo-32587: Make winreg.REG_MULTI_SZ support PendingFileRenameOperations

* Address review comments.
(cherry picked from commit e223ba13d8d871ee58570dfca4e82a591189cc2f)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
3 files changed