More bidi improvements

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/i18n/ru.json

@@ -133,8 +133,7 @@
   "Breadcrumbs": "Хлебные крошки",
   "Browser notifications": "Уведомления в браузере",
   "Bullet list": "Маркированный список",
-  "By @{group}": "Из @{group}",
-  "By @{username}": "От @{username}",
+  "By {username}": "От {username}",
   "By others": "Другими",
   "By {author}": "Автор {author}",
   "By {group}": "Автор: {group}",