fixing warnings with regexps on assert_match

actionpack/test/controller/log_subscriber_test.rb

@@ -151,8 +151,8 @@ def test_with_fragment_cache_and_percent_in_key
     wait
 
     assert_equal 4, logs.size
-    assert_match /Exist fragment\? views\/foo%bar/, logs[1]
-    assert_match /Write fragment views\/foo%bar/, logs[2]
+    assert_match(/Exist fragment\? views\/foo%bar/, logs[1])
+    assert_match(/Write fragment views\/foo%bar/, logs[2])
   ensure
     @controller.config.perform_caching = true
   end