fix linting

Author: Essk

test/playback.test.js

@@ -366,7 +366,7 @@ if (!videojs.browser.IS_FIREFOX) {
     player.src({
       src: 'https://dash.akamaized.net/dash264/TestCases/10a/1/iis_forest_short_poem_multi_lang_480p_single_adapt_aaclc_sidx.mpd',
       type: 'application/dash+xml'
-    });the 
+    });
   });