fixed typos

framework/caching/ZendDataCache.php

@@ -10,7 +10,7 @@ namespace yii\caching;
 /**
  * ZendDataCache provides Zend data caching in terms of an application component.
  *
- * To use this application component, the [Zend Data Cache PHP extensionn](http://www.zend.com/en/products/server/)
+ * To use this application component, the [Zend Data Cache PHP extension](http://www.zend.com/en/products/server/)
  * must be loaded.
  *
  * See [[Cache]] for common cache operations that ZendDataCache supports.

framework/console/controllers/AppController.php

@@ -159,7 +159,7 @@ class AppController extends Controller
 	 * @param string $pathTo path to file we want to get relative path for
 	 * @param string $varName variable name w/o $ to replace value with relative path for
 	 *
-	 * @return string target file contetns
+	 * @return string target file contents
 	 */
 	public function replaceRelativePath($source, $pathTo, $varName)
 	{