Fix subscribers counter on WebUI

app/javascript/mastodon/components/common_counter.js

@@ -57,6 +57,18 @@ export function counterRenderer(counterType, isBold = true) {
       />
     );
   }
+  case 'subscribers': {
+    return (displayNumber, pluralReady) => (
+      <FormattedMessage
+        id='account.subscribers_counter'
+        defaultMessage='{count, plural, one {{counter} Subscriber} other {{counter} Subscribers}}'
+        values={{
+          count: pluralReady,
+          counter: renderCounter(displayNumber),
+        }}
+      />
+    );
+  }
   default: throw Error(`Incorrect counter name: ${counterType}. Ensure it accepted by commonCounter function`);
   }
 }

app/javascript/mastodon/features/account/components/header.js

@@ -403,7 +403,10 @@ class Header extends ImmutablePureComponent {
 
                 { (me === account.get('id')) && (
                   <NavLink exact activeClassName='active' to={`/accounts/${account.get('id')}/subscribing`} title={intl.formatNumber(account.get('subscribing_count'))}>
-                    <strong>{shortNumberFormat(account.get('subscribing_count'))}</strong> <FormattedMessage id='account.subscribes' defaultMessage='Subscribes' />
+                    <ShortNumber
+                      value={account.get('subscribing_count')}
+                      renderer={counterRenderer('subscribers')}
+                    />
                   </NavLink>
                 )}
               </div>