Update flake8 comments to "new" format

WhyNotHugo · WhyNotHugo · commit 2c44f7d773d6 · 2022-12-03T16:25:08.000+01:00
diff --git a/setup.cfg b/setup.cfg
@@ -11,8 +11,10 @@ addopts =
 [flake8]
 application-import-names = tests,vdirsyncer
 extend-ignore =
-  E203,  # Black-incompatible colon spacing.
-  W503,  # Line jump before binary operator.
+  # Black-incompatible colon spacing.
+  E203,
+  # Line jump before binary operator.
+  W503,
   I100,
   I202
 max-line-length = 88
