fix

Author: Watson1978

.rubocop.yml

@@ -31,9 +31,16 @@ Style/ArgumentsForwarding:
 Style/ClassAndModuleChildren:
   Enabled: false
 
+Style/ClassVars:
+  Exclude:
+    - 'test/**/*.rb'
+
 Style/FetchEnvVar:
   Enabled: false
 
+Style/StringConcatenation:
+  Enabled: false
+
 Style/StringHashKeys:
   Enabled: false
 

test/fluent/plugin/test_out_otlp.rb

@@ -8,7 +8,7 @@
 require "webrick"
 
 class Fluent::Plugin::OtlpOutputTest < Test::Unit::TestCase
-  class ServerRequest < Struct.new(:request_method, :path, :header, :body); end
+  ServerRequest = Struct.new(:request_method, :path, :header, :body)
 
   DEFAULT_LOGGER = ::WEBrick::Log.new($stdout, ::WEBrick::BasicLog::FATAL)