formatting: drop `grey`, our custom black version

Now that the official black has all we want, we can drop this.

black.toml

@@ -1,17 +1,16 b''
 [tool.black]
 line-length = 80
 exclude = '''
 build/
 | wheelhouse/
 | dist/
 | packages/
 | \.hg/
 | \.mypy_cache/
 | \.venv/
 | mercurial/thirdparty/
 | hgext/fsmonitor/pywatchman/
 | contrib/python-zstandard/
-| contrib/grey.py
 '''
 skip-string-normalization = true
 quiet = true

tests/test-check-code.t

@@ -1,87 +1,86 b''
 #require test-repo
 
   $ . "$TESTDIR/helpers-testrepo.sh"
   $ check_code="$TESTDIR"/../contrib/check-code.py
   $ cd "$TESTDIR"/..
 
 New errors are not allowed. Warnings are strongly discouraged.
 (The writing "no-che?k-code" is for not skipping this file when checking.)
 
   $ testrepohg locate \
   > -X contrib/python-zstandard \
   > -X hgext/fsmonitor/pywatchman \
   > -X mercurial/thirdparty \
   > | sed 's-\\-/-g' | "$check_code" --warnings --per-file=0 - || false
   Skipping contrib/automation/hgautomation/__init__.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/aws.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/cli.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/linux.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/pypi.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/ssh.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/try_server.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/windows.py it has no-che?k-code (glob)
   Skipping contrib/automation/hgautomation/winrm.py it has no-che?k-code (glob)
-  Skipping contrib/grey.py it has no-che?k-code (glob)
   Skipping contrib/packaging/hgpackaging/downloads.py it has no-che?k-code (glob)
   Skipping contrib/packaging/hgpackaging/inno.py it has no-che?k-code (glob)
   Skipping contrib/packaging/hgpackaging/py2exe.py it has no-che?k-code (glob)
   Skipping contrib/packaging/hgpackaging/util.py it has no-che?k-code (glob)
   Skipping contrib/packaging/hgpackaging/wix.py it has no-che?k-code (glob)
   Skipping contrib/packaging/inno/build.py it has no-che?k-code (glob)
   Skipping contrib/packaging/wix/build.py it has no-che?k-code (glob)
   Skipping i18n/polib.py it has no-che?k-code (glob)
   Skipping mercurial/statprof.py it has no-che?k-code (glob)
   Skipping tests/badserverext.py it has no-che?k-code (glob)
 
 @commands in debugcommands.py should be in alphabetical order.
 
   >>> import re
   >>> commands = []
   >>> with open('mercurial/debugcommands.py', 'rb') as fh:
   ...     for line in fh:
   ...         m = re.match(br"^@command\('([a-z]+)", line)
   ...         if m:
   ...             commands.append(m.group(1))
   >>> scommands = list(sorted(commands))
   >>> for i, command in enumerate(scommands):
   ...     if command != commands[i]:
   ...         print('commands in debugcommands.py not sorted; first differing '
   ...               'command is %s; expected %s' % (commands[i], command))
   ...         break
 
 Prevent adding new files in the root directory accidentally.
 
   $ testrepohg files 'glob:*'
   .arcconfig
   .clang-format
   .editorconfig
   .hgignore
   .hgsigs
   .hgtags
   .jshintrc
   CONTRIBUTING
   CONTRIBUTORS
   COPYING
   Makefile
   README.rst
   black.toml
   hg
   hgeditor
   hgweb.cgi
   setup.py
 
 Prevent adding modules which could be shadowed by ancient .so/.dylib.
 
   $ testrepohg files \
   > mercurial/base85.py \
   > mercurial/bdiff.py \
   > mercurial/diffhelpers.py \
   > mercurial/mpatch.py \
   > mercurial/osutil.py \
   > mercurial/parsers.py \
   > mercurial/zstd.py
   [1]
 
 Keep python3 tests sorted:
   $ sort < contrib/python3-whitelist > $TESTTMP/py3sorted
   $ cmp contrib/python3-whitelist $TESTTMP/py3sorted || echo 'Please sort passing tests!'

tests/test-check-format.t

@@ -1,5 +1,5 b''
 #require black
 
   $ cd $RUNTESTDIR/..
-  $ black --config=black.toml --check --diff `hg files 'set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**" - contrib/grey.py'`
+  $ black --config=black.toml --check --diff `hg files 'set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**"'`
 

tests/test-check-module-imports.t

@@ -1,40 +1,39 b''
 #require test-repo
 
   $ . "$TESTDIR/helpers-testrepo.sh"
   $ import_checker="$TESTDIR"/../contrib/import-checker.py
 
   $ cd "$TESTDIR"/..
 
 There are a handful of cases here that require renaming a module so it
 doesn't overlap with a stdlib module name. There are also some cycles
 here that we should still endeavor to fix, and some cycles will be
 hidden by deduplication algorithm in the cycle detector, so fixing
 these may expose other cycles.
 
 Known-bad files are excluded by -X as some of them would produce unstable
 outputs, which should be fixed later.
 
   $ testrepohg locate 'set:**.py or grep(r"^#!.*?python")' \
   > 'tests/**.t' \
   > -X hgweb.cgi \
   > -X setup.py \
   > -X contrib/automation/ \
   > -X contrib/debugshell.py \
-  > -X contrib/grey.py \
   > -X contrib/hgweb.fcgi \
   > -X contrib/packaging/hg-docker \
   > -X contrib/packaging/hgpackaging/ \
   > -X contrib/packaging/inno/ \
   > -X contrib/python-zstandard/ \
   > -X contrib/win32/hgwebdir_wsgi.py \
   > -X contrib/perf-utils/perf-revlog-write-plot.py \
   > -X doc/gendoc.py \
   > -X doc/hgmanpage.py \
   > -X i18n/posplit \
   > -X mercurial/thirdparty \
   > -X tests/hypothesishelpers.py \
   > -X tests/test-check-interfaces.py \
   > -X tests/test-demandimport.py \
   > -X tests/test-imports-checker.t \
   > -X tests/test-verify-repo-operations.py \
   > | sed 's-\\-/-g' | "$PYTHON" "$import_checker" -

tests/test-check-py3-compat.t

@@ -1,53 +1,52 b''
 #require test-repo
 
   $ . "$TESTDIR/helpers-testrepo.sh"
   $ cd "$TESTDIR"/..
 
 #if no-py3
   $ testrepohg files 'set:(**.py)' \
   > -X contrib/automation/ \
-  > -X contrib/grey.py \
   > -X contrib/packaging/hgpackaging/ \
   > -X contrib/packaging/inno/ \
   > -X contrib/packaging/wix/ \
   > -X hgdemandimport/demandimportpy2.py \
   > -X mercurial/thirdparty/cbor \
   > | sed 's|\\|/|g' | xargs "$PYTHON" contrib/check-py3-compat.py
   contrib/python-zstandard/setup.py not using absolute_import
   contrib/python-zstandard/setup_zstd.py not using absolute_import
   contrib/python-zstandard/tests/common.py not using absolute_import
   contrib/python-zstandard/tests/test_buffer_util.py not using absolute_import
   contrib/python-zstandard/tests/test_compressor.py not using absolute_import
   contrib/python-zstandard/tests/test_compressor_fuzzing.py not using absolute_import
   contrib/python-zstandard/tests/test_data_structures.py not using absolute_import
   contrib/python-zstandard/tests/test_data_structures_fuzzing.py not using absolute_import
   contrib/python-zstandard/tests/test_decompressor.py not using absolute_import
   contrib/python-zstandard/tests/test_decompressor_fuzzing.py not using absolute_import
   contrib/python-zstandard/tests/test_estimate_sizes.py not using absolute_import
   contrib/python-zstandard/tests/test_module_attributes.py not using absolute_import
   contrib/python-zstandard/tests/test_train_dictionary.py not using absolute_import
   setup.py not using absolute_import
 #endif
 
 #if py3
   $ testrepohg files 'set:(**.py) - grep(pygments)' \
   > -X hgdemandimport/demandimportpy2.py \
   > -X hgext/fsmonitor/pywatchman \
   > -X mercurial/cffi \
   > -X mercurial/thirdparty \
   > | sed 's|\\|/|g' | xargs "$PYTHON" contrib/check-py3-compat.py \
   > | sed 's/[0-9][0-9]*)$/*)/'
   hgext/convert/transport.py: error importing: <*Error> No module named 'svn.client' (error at transport.py:*) (glob) (?)
   hgext/infinitepush/sqlindexapi.py: error importing: <*Error> No module named 'mysql' (error at sqlindexapi.py:*) (glob) (?)
   mercurial/scmwindows.py: error importing: <ValueError> _type_ 'v' not supported (error at win32.py:*) (no-windows !)
   mercurial/win32.py: error importing: <ValueError> _type_ 'v' not supported (error at win32.py:*) (no-windows !)
   mercurial/windows.py: error importing: <ModuleNotFoundError> No module named 'msvcrt' (error at windows.py:*) (no-windows !)
   mercurial/posix.py: error importing: <ModuleNotFoundError> No module named 'fcntl' (error at posix.py:*) (windows !)
   mercurial/scmposix.py: error importing: <ModuleNotFoundError> No module named 'fcntl' (error at scmposix.py:*) (windows !)
 #endif
 
 #if py3 pygments
   $ testrepohg files 'set:(**.py) and grep(pygments)' | sed 's|\\|/|g' \
   > | xargs "$PYTHON" contrib/check-py3-compat.py \
   > | sed 's/[0-9][0-9]*)$/*)/'
 #endif