Fix bugs, typos and loose comparisons (#19199)

* Fix bugs, typos and loose comparisons

Bugs:
- PluginConfig: sprintf format "%ss" -> "%s" (extra 's')
- ExceptionTrap: loose comparison == -> === for object comparison
- Route: loose comparison != -> !== for value comparison

Typos:
- Router: "reverser routing" -> "reverse routing"
- Router/functions: "can be name any" -> "can be any" (4 occurrences)
- ValidatorAwareTrait: "does not exists" -> "does not exist"
- Validation: "and and arrays" -> "and arrays" (2 occurrences)
- Message: "no should more" -> "should not exceed", "no must more" -> "must not exceed"
- Mailer: "Render instance" -> "Renderer instance"
- TransportRegistry: "cache engine" -> "transport" (3 occurrences)
- I18n: "based of" -> "based on" (2 occurrences), "configure" -> "configured"
- ErrorHandlerMiddleware: "contructor" -> "constructor"
- Log: "Cake Logs's" -> "Cake Log's"
- HelperRegistry: "Sets The IO" -> "Sets the IO"
- FileConfigTrait: "with ../" -> "with .." (matches actual check)
- Hash: "file in" -> "find in"
- CookieCryptTrait: "keep keys are" -> "keep keys in"

* Fix Cache documentation errors

- Cache.php: Remove non-existent XcacheEngine, fix "MemcacheEngine" -> "MemcachedEngine"
- MemcachedEngine.php: Fix "MemcacheEngine" -> "MemcachedEngine"
- ApcuEngine.php: Fix "APC" -> "APCu"

* Fix inconsistent @return docblocks

- ArrayLog/ConsoleLog: Remove contradictory "success of write" from @return void
- ArrayEngine/ApcuEngine: Fix redundant "True Returns true" -> "True on success"

* Update test to match corrected error message
* Revert Route.php loose comparison change (intentional for type coercion)

Author: dereuromark

Cache.php

@@ -56,10 +56,9 @@
  * - `FileEngine` - Uses simple files to store content. Poor performance, but good for
  *    storing large objects, or things that are not IO sensitive. Well suited to development
  *    as it is an easy cache to inspect and manually flush.
- * - `MemcacheEngine` - Uses the PECL::Memcache extension and Memcached for storage.
- *    Fast reads/writes, and benefits from memcache being distributed.
+ * - `MemcachedEngine` - Uses the PECL::Memcached extension and Memcached for storage.
+ *    Fast reads/writes, and benefits from memcached being distributed.
  * - `RedisEngine` - Uses redis and php-redis extension to store cache data.
- * - `XcacheEngine` - Uses the Xcache extension, an alternative to APCu.
  *
  * See Cache engine documentation for expected configuration keys.
  *

Engine/ApcuEngine.php

@@ -192,9 +192,9 @@ public function delete(string $key): bool
     }
 
     /**
-     * Delete all keys from the cache. This will clear every cache config using APC.
+     * Delete all keys from the cache. This will clear every cache config using APCu.
      *
-     * @return bool True Returns true.
+     * @return bool True on success.
      * @link https://secure.php.net/manual/en/function.apcu-cache-info.php
      * @link https://secure.php.net/manual/en/function.apcu-delete.php
      */

Engine/ArrayEngine.php

@@ -196,7 +196,7 @@ public function delete(string $key): bool
     /**
      * Delete all keys from the cache.
      *
-     * @return bool True Returns true.
+     * @return bool True on success.
      */
     public function clear(): bool
     {

Engine/MemcachedEngine.php

@@ -72,7 +72,7 @@ class MemcachedEngine extends CacheEngine
      * - `serialize` The serializer engine used to serialize data. Available engines are 'php',
      *    'igbinary' and 'json'. Besides 'php', the memcached extension must be compiled with the
      *    appropriate serializer support.
-     * - `servers` String or array of memcached servers. If an array MemcacheEngine will use
+     * - `servers` String or array of memcached servers. If an array MemcachedEngine will use
      *    them as a pool.
      * - `options` - Additional options for the memcached client. Should be an array of option => value.
      *    Use the \Memcached::OPT_* constants as keys.