[eslint] updated eslintrc and improved the code (#4702)

frontend/src/components/file-content-view/video.js

@@ -9,19 +9,19 @@ const {
 
 class FileContent extends React.Component {
   render() {
-    const videoJsOptions = { 
+    const videoJsOptions = {
       autoplay: false,
       controls: true,
       preload: 'auto',
       sources: [{
         src: rawPath
-      }]  
-    };  
+      }]
+    };
     return (
       <div className="file-view-content flex-1 video-file-view">
         <VideoPlayer { ...videoJsOptions } />
       </div>
-    );  
+    );
   }
 }