Fix undefined method for nil spec with ruby-head

spec/integration/sinatra_spec.rb

@@ -122,7 +122,11 @@ class MySinatraApp < Sinatra::Base
       it 'logs the request with the exception' do
         get '/error', {}, 'HTTP_X_REQUEST_ID' => '700a6a01'
 
-        expect(last_log_entry).to start_with("E, #{time_pid_tags} GET /error 500 in 0ms type=request #{data_as_text} exception=undefined method `name' for nil")
+        if Gem::Version.new(RUBY_VERSION) > Gem::Version.new('3.4')
+          expect(last_log_entry).to start_with("E, #{time_pid_tags} GET /error 500 in 0ms type=request #{data_as_text} exception=undefined method 'name' for nil")
+        else
+          expect(last_log_entry).to start_with("E, #{time_pid_tags} GET /error 500 in 0ms type=request #{data_as_text} exception=undefined method `name' for nil")
+        end
       end
     end
   end