Correct spelling & grammar in 4.4 components/cache/

components/cache/adapters/php_array_cache_adapter.rst

@@ -7,7 +7,7 @@ PHP Array Cache Adapter
 
 This adapter is a high performance cache for static data (e.g. application configuration)
 that is optimized and preloaded into OPcache memory storage. It is suited for any data that
-is mostly read-only after warmup::
+is mostly read-only after warm-up::
 
     use Symfony\Component\Cache\Adapter\FilesystemAdapter;
     use Symfony\Component\Cache\Adapter\PhpArrayAdapter;
@@ -23,7 +23,7 @@ is mostly read-only after warmup::
         $cache = new PhpArrayAdapter(
             // single file where values are cached
             __DIR__ . '/somefile.cache',
-            // a backup adapter, if you set values after warmup
+            // a backup adapter, if you set values after warm-up
             new FilesystemAdapter()
         );
         $cache->warmUp($values);

components/cache/adapters/redis_adapter.rst

@@ -213,7 +213,7 @@ try to add data when no memory is available. An example setting could look as fo
     maxmemory 100mb
     maxmemory-policy allkeys-lru
 
-Read more about this topic in the offical `Redis LRU Cache Documentation`_.
+Read more about this topic in the official `Redis LRU Cache Documentation`_.
 
 .. _`Data Source Name (DSN)`: https://en.wikipedia.org/wiki/Data_source_name
 .. _`Redis server`: https://redis.io/

components/cache/cache_invalidation.rst

@@ -7,7 +7,7 @@ Cache Invalidation
 
 Cache invalidation is the process of removing all cached items related to a
 change in the state of your model. The most basic kind of invalidation is direct
-items deletion. But when the state of a primary resource has spread across
+item deletion. But when the state of a primary resource has spread across
 several cached items, keeping them in sync can be difficult.
 
 The Symfony Cache component provides two mechanisms to help solve this problem:
@@ -47,7 +47,7 @@ you can invalidate the cached items by calling
     // if you know the cache key, you can also delete the item directly
     $cache->delete('cache_key');
 
-Using tags invalidation is very useful when tracking cache keys becomes difficult.
+Using tag invalidation is very useful when tracking cache keys becomes difficult.
 
 Tag Aware Adapters
 ~~~~~~~~~~~~~~~~~~