devel/py-black: Really fix packaging issues

* When the port was updated via dea032cba8, it still wouldn't build,
  which was then fixed with 25b2be6023.

  Although the port can now be built, the content of the generated
  package is not correct at the moment as every Python module is placed
  into an additional "src/" directory.

  There was an attempt to fix the problem via 76670f6a4f, but the
  root cause has not yet been eliminated because the Python module is
  still not usable:

  $ python3.9 -m black
  /usr/local/bin/python3.9: No module named black

* Remedy these issues by adjusting the backported "setup.py" to generate
  the correct package content.

* Bump PORTREVISION due package change.

PR:		267040 [1]
Reported by:	Martin Birgmeier [1]
		pkg-fallout (for games/anki which requires py-black)
Approved by:	portmgr (blanket, fix packaging issues)
Fixes:	25b2be6023 devel/py-black: fix build

devel/py-black/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	black
 PORTVERSION=	22.10.0
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

devel/py-black/files/setup.py

@@ -53,11 +53,6 @@ setup(
             'blackd = blackd:patched_main [d]',
         ],
     },
-    packages=[
-        'scripts',
-        'src.black',
-        'src.blackd',
-        'src.blib2to3',
-        'src.blib2to3.pgen2',
-    ],
+    package_dir={'': 'src'},
+    package_data={'': ['*']},
 )