typos. [skip ci]

docs/guide/caching-data.md

@@ -8,7 +8,7 @@ and [content caching](caching-content.md).
 The following code is a typical usage pattern of data caching, where `$cache` refers to
 a [cache component](#cache-components):
 
-```
+```php
 // try retrieving $data from cache
 $data = $cache->get($key);
 

docs/guide/caching-http.md

@@ -52,6 +52,7 @@ the page modification time. The signature of the PHP callable should be as follo
  * @param Action $action the action object that is being handled currently
  * @param array $params the value of the "params" property
  * @return integer a UNIX timestamp representing the page modification time
+ */
 function ($action, $params)
 ```
 
@@ -70,6 +71,7 @@ should be as follows,
  * @param Action $action the action object that is being handled currently
  * @param array $params the value of the "params" property
  * @return string a string used as the seed for generating an ETag hash
+ */
 function ($action, $params)
 ```