Rebase _Pyink_ to _Black_ v23.9.1.

Notably the the preview style for "dummy implementations" is disabled in Pyink as it doesn't play well with our linter (yet). The change in _Black_ is from psf#3796.

PiperOrigin-RevId: 573023762

Author: yilei

CHANGES.md

@@ -4,7 +4,9 @@ All notable changes to Pyink are recorded here.
 
 ## Unreleased
 
-* Nothing notable unreleased.
+* _Black_ v23.9.9's new concise formatting for dummy implementations from
+  [psf/black#3796](https://github.com/psf/black/pull/3796) is temporarily
+  disabled for _Pyink_.
 
 ## 23.5.0