[test] adjust LoggerSilence stub to match Rails

Author: kares

src/spec/ruby/rails/stub/active_support/logger_silence.rb

@@ -12,16 +12,18 @@ def self.included(base)
       base.class_eval do
         # cattr_accessor :silencer, default: true
         @@silencer = true
-        def self.silencer; @@silencer end
-        def silencer; self.class.silencer end
+        module_eval do
+          def self.silencer; @@silencer end
+          def silencer; @@silencer end
+        end
 
         include ActiveSupport::LoggerThreadSafeLevel
       end
     end
 
     # Silences the logger for the duration of the block.
     def silence(severity = Logger::ERROR)
-      silencer ? log_at(severity) { yield self } : yield(self)
+      silencer ? log_at(severity) { yield(self) } : yield(self)
     end
   end
 end