Preserve directive doesn't work as intended

[Hirse]

1. /* beautify preserve:end */ is ignored.
   Thus any file containing /* beautify preserve:start */ will not be correctly beautified.

   /* beautify preserve:start */
   var a  = 0;
   var aa = 1;
   /* beautify preserve:end */
   var b =  1;

2. /* beautify preserve:start */is ignored if the ignore directory has been used before.

   /* beautify ignore:start */
   var a  = 0;
   var aa = 1;
   /* beautify ignore:end */
   var b =  2;
   /* beautify preserve:start */
   var c  = 0;
   var cc = 1;
   /* beautify preserve:end */
   var d =  1;

   becomes this after beautification:

   /* beautify ignore:start */
   var a  = 0;
   var aa = 1;
   /* beautify ignore:end */
   var b = 2;
   /* beautify preserve:start */
   var c = 0;
   var cc = 1;
   /* beautify preserve:end */
   var d = 1;

[bitwiseman]

Great report, thanks. This tells me exactly where the problem is. 👍

[Hirse]

Your reaction time is impressive.
And thanks for correcting the title. 😉