Upgrade ESLint to version 4.x (#6276)

app/javascript/mastodon/components/attachment_list.js

@@ -20,11 +20,11 @@ export default class AttachmentList extends ImmutablePureComponent {
         </div>
 
         <ul className='attachment-list__list'>
-          {media.map(attachment =>
+          {media.map(attachment => (
             <li key={attachment.get('id')}>
               <a href={attachment.get('remote_url')} target='_blank' rel='noopener'>{filename(attachment.get('remote_url'))}</a>
             </li>
-          )}
+          ))}
         </ul>
       </div>
     );

app/javascript/mastodon/components/collapsable.js

@@ -5,11 +5,11 @@ import PropTypes from 'prop-types';
 
 const Collapsable = ({ fullHeight, isVisible, children }) => (
   <Motion defaultStyle={{ opacity: !isVisible ? 0 : 100, height: isVisible ? fullHeight : 0 }} style={{ opacity: spring(!isVisible ? 0 : 100), height: spring(!isVisible ? 0 : fullHeight) }}>
-    {({ opacity, height }) =>
+    {({ opacity, height }) => (
       <div style={{ height: `${height}px`, overflow: 'hidden', opacity: opacity / 100, display: Math.floor(opacity) === 0 ? 'none' : 'block' }}>
         {children}
       </div>
-    }
+    )}
   </Motion>
 );
 

app/javascript/mastodon/components/icon_button.js

@@ -93,7 +93,7 @@ export default class IconButton extends React.PureComponent {
 
     return (
       <Motion defaultStyle={{ rotate: active ? -360 : 0 }} style={{ rotate: animate ? spring(active ? -360 : 0, { stiffness: 120, damping: 7 }) : 0 }}>
-        {({ rotate }) =>
+        {({ rotate }) => (
           <button
             aria-label={title}
             aria-pressed={pressed}
@@ -106,7 +106,7 @@ export default class IconButton extends React.PureComponent {
           >
             <i style={{ transform: `rotate(${rotate}deg)` }} className={`fa fa-fw fa-${icon}`} aria-hidden='true' />
           </button>
-        }
+        )}
       </Motion>
     );
   }

app/javascript/mastodon/components/status.js

@@ -178,14 +178,16 @@ export default class Status extends ImmutablePureComponent {
 
         media = (
           <Bundle fetchComponent={Video} loading={this.renderLoadingVideoPlayer} >
-            {Component => <Component
-              preview={video.get('preview_url')}
-              src={video.get('url')}
-              width={239}
-              height={110}
-              sensitive={status.get('sensitive')}
-              onOpenVideo={this.handleOpenVideo}
-            />}
+            {Component => (
+              <Component
+                preview={video.get('preview_url')}
+                src={video.get('url')}
+                width={239}
+                height={110}
+                sensitive={status.get('sensitive')}
+                onOpenVideo={this.handleOpenVideo}
+              />
+            )}
           </Bundle>
         );
       } else {