    ;; %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,

     my-yasnippet
     my-ztree)

   ;; List of additional packages that will be installed without being
   ;; wrapped in a layer. If you need some configuration for these
   ;; packages, then consider creating a layer. You can also put the
   ;; configuration in `dotspacemacs/user-config'.
   ;; To use a local version of a package, use the `:location' property:
   ;; '(your-package :location "~/path/to/your-package/")
   ;; Also include the dependencies as they will not be resolved automatically.
   dotspacemacs-additional-packages '()



   ;; 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)
