anchor.diff:          config = "(which-key-mode)";
         };
   
  -      # Remember where we where in a previously visited file. Built-in.
  +      highlight-symbol = {
  +        enable = true;
  +        diminish = [ "highlight-symbol-mode" ];
  +        config = ''
  +          (add-hook 'prog-mode-hook 'highlight-symbol-mode)
  +          (setq highlight-symbol-idle-delay .2
  +                highlight-symbol-highlight-single-occurrence nil));
  +        '';
  +      };
  +
  +      # Remember where we where in a previously visited file.
         saveplace = {
           enable = true;
           config = ''
  
positive.code:         '';
        };
  
        # More helpful buffer names. Built-in.
        uniquify = {
          enable = true;
          config = ''
  
negative.code:     usePackage = {
        gruvbox-theme = {
          enable = true;
          config = ''
            ;; Only use theme if GUI
            (if (display-graphic-p) 
              (load-theme 'gruvbox-light-soft t))
          '';
        };
  
        which-key = {
  