Simplify syntax highlighting of new notes

app/assets/javascripts/notes.js.coffee

@@ -122,8 +122,9 @@ class @Notes
     # or skip if rendered
     if @isNewNote(note)
       @note_ids.push(note.id)
-      $('ul.main-notes-list').append(note.html)
-      $('.js-syntax-highlight').syntaxHighlight()
+      $('ul.main-notes-list').
+        append(note.html).
+        syntaxHighlight()
       @initTaskList()
 
   ###