Bug 1850283 - follow-up to fix linting. rs=eslint DONTBUILD

--HG--
extra : amend_source : 1ed2c3dc548f087f04d9e6b54637622d88b8fdef

mail/base/content/folderDisplay.js

@@ -1152,10 +1152,7 @@ FolderDisplayWidget.prototype = {
     //  persistent than our saveSelection/restoreSelection stuff), and the view
     //  is backed by a single underlying folder (the only way having just a
     //  message key works out), try that
-    if (
-      this.view.isSingleFolder &&
-      this.view.displayedFolder
-    ) {
+    if (this.view.isSingleFolder && this.view.displayedFolder) {
       // use the displayed folder; nsMsgDBView goes to the effort to save the
       //  state to the viewFolder, so this is the correct course of action.
       let lastLoadedMessageKey = this.view.displayedFolder.lastMessageLoaded;