CS fixes.

yii/db/Migration.php

@@ -132,7 +132,8 @@ class Migration extends \yii\base\Component
 	 * Executes a SQL statement.
 	 * This method executes the specified SQL statement using [[db]].
 	 * @param string $sql the SQL statement to be executed
-	 * @param array $params input parameters (name=>value) for the SQL execution. See [[Command::execute()]] for more details.
+	 * @param array $params input parameters (name => value) for the SQL execution.
+	 * See [[Command::execute()]] for more details.
 	 */
 	public function execute($sql, $params = array())
 	{