added exclude_entity to analysis_options.yaml

Author: iimironchuk

lint_test/analysis_options.yaml

@@ -4,6 +4,9 @@ analyzer:
 
 custom_lint:
   rules:
+    - prefer_match_file_name:
+      exclude_entity:
+        - extension
     - cyclomatic_complexity:
       max_complexity: 4
       exclude:

lint_test/prefer_match_file_name_extension_test.dart

@@ -1,5 +1,6 @@
 // ignore_for_file: unused_element, unused_field
 
 /// Check the `prefer_match_file_name` rule
+/// To trigger lint delete "extension" from exclude_entity in analysis_options.yaml
 // expect_lint: prefer_match_file_name
 extension WrongExtension on List {}