Add comments to each data

Author: paulbalandan

tests/system/Cache/Handlers/RedisHandlerTest.php

@@ -175,8 +175,12 @@ public function testDeleteMatching(string $pattern, int $expectedDeleteCount, st
      */
     public static function provideDeleteMatching(): iterable
     {
+        // Given the key "key_1*", deleteMatching() should delete 13 keys:
+        // key_1, key_10, key_11, key_12, key_13, key_14, key_15, key_16, key_17, key_18, key_19, key_100, key_101
         yield 'prefix' => ['key_1*', 13];
 
+        // Given the key "*1", deleteMatching() should delete 11 keys: 
+        // key_1, key_11, key_21, key_31, key_41, key_51, key_61, key_71, key_81, key_91, key_101
         yield 'suffix' => ['*1', 11];
 
         yield 'cache-prefix' => ['key_1*', 13, 'foo_'];