Update ISSUE_TEMPLATE

ISSUE_TEMPLATE

@@ -5,13 +5,13 @@ Before filing an issue:
 
 - Search existing issues, including issues that are closed. If an existing issue
   exists, please do not file a new one.
-  
+
 - Consult our FAQs, supported devices and supported formats pages. These can be
   found at https://google.github.io/ExoPlayer/.
-  
+
 - Rule out issues in your own code. A good way to do this is to try and
   reproduce the issue in the ExoPlayer demo app.
-  
+
 - This issue tracker is intended for bugs, feature requests and ExoPlayer
   specific questions. If you're asking a general Android development question,
   please do so on Stack Overflow.