And more linting.

ext/index/main.php

@@ -161,7 +161,7 @@
 class SearchTermParseEvent extends Event {
 	/** @var null|string  */
 	public $term = null;
-	/** @var null */
+	/** @var string[] */
 	public $context = array();
 	/** @var \Querylet[] */
 	public $querylets = array();

ext/rating/main.php

@@ -242,7 +242,7 @@ class Ratings extends Extension {
 	}
 
 	/**
-	 * @param $context
+	 * @param string[] $context
 	 * @return bool
 	 */
 	private function no_rating_query($context) {