    ;; %n - Narrow if appropriate
    ;; %z - mnemonics of buffer, terminal, and keyboard coding systems
    ;; %Z - like %z, but including the end-of-line format
+   ;; If nil then Spacemacs uses default `frame-title-format' to avoid
+   ;; performance issues, instead of calculating the frame title by
+   ;; `spacemacs/title-prepare' all the time.
    ;; (default "%I@%S")
-   dotspacemacs-frame-title-format "%I@%S"
+   dotspacemacs-frame-title-format nil
 
    ;; Format specification for setting the icon title format
    ;; (default nil - same as frame-title-format)
    dotspacemacs-icon-title-format nil
+
+   ;; Show trailing whitespace (default t)
+   dotspacemacs-show-trailing-whitespace t
 
    ;; Delete whitespace while saving buffer. Possible values are `all'
    ;; to aggressively delete empty line and long sequences of whitespace,

   ;; List of items to show in startup buffer or an association list of
   ;; the form `(list-type . list-size)`. If nil then it is disabled.
   ;; Possible values for list-type are:
   ;; `recents' `bookmarks' `projects' `agenda' `todos'.
   ;; List sizes may be nil, in which case
   ;; `spacemacs-buffer-startup-lists-length' takes effect.
   dotspacemacs-startup-lists '((recents . 5)
                                (projects . 7))

   ;; True if the home buffer should respond to resize events. (default t)
   dotspacemacs-startup-buffer-responsive t

   ;; Default major mode for a new empty buffer. Possible values are mode
   ;; names such as `text-mode'; and `nil' to use Fundamental mode.


   ;; Default major mode of the scratch buffer (default `text-mode')
   dotspacemacs-scratch-mode 'text-mode

   ;; If non-nil, *scratch* buffer will be persistent. Things you write down in
   ;; *scratch* buffer will be saved and restored automatically.
   dotspacemacs-scratch-buffer-persistent nil

   ;; If non-nil, `kill-buffer' on *scratch* buffer
   ;; will bury it instead of killing.
   dotspacemacs-scratch-buffer-unkillable nil

   ;; Initial message in the scratch buffer, such as "Welcome to Spacemacs!"
   ;; (default nil)
