anchor.diff:          type = types.lines;
           default = "";
           description = ''
  -          Shell script code called during fish login shell initialisation.
  +          Shell script code called during fish login shell
  +          initialisation.
           '';
         };
   
  
positive.code:         default = {};
          example = { l = "less"; gco = "git checkout"; };
          description = ''
            Set of abbreviations for fish shell.
          '';
        };
  
  
negative.code:         type = types.lines;
          default = "";
          description = ''
            Shell script code called during fish shell
            initialisation.
          '';
        };
  
  