Fix ruff.toml syntax and suppress emergent failure.

Author: jaraco

ruff.toml

@@ -2,6 +2,10 @@
 extend-select = [
 	"C901",
 	"W",
+
+	# local
+	"UP",  # pyupgrade
+	"YTT",  # flake8-2020
 ]
 ignore = [
 	# https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules
@@ -20,10 +24,6 @@ ignore = [
 	"ISC001",
 	"ISC002",
 ]
-extend-select = [
-	"UP",  # pyupgrade
-	"YTT",  # flake8-2020
-]
 extend-ignore = [
 	"UP015",  # redundant-open-modes, explicit is preferred
 	"UP030",  # temporarily disabled

setuptools/command/easy_install.py

@@ -565,7 +565,7 @@ def cant_write_to_target(self):
             msg += '\n' + self.__access_msg
         raise DistutilsError(msg)
 
-    def check_pth_processing(self):
+    def check_pth_processing(self):  # noqa: C901
         """Empirically verify whether .pth files are supported in inst. dir"""
         instdir = self.install_dir
         log.info("Checking .pth file support in %s", instdir)