Stringify inserts double newlines into multi-line comments

[claudiopro]

Our CSS files have multi-line copyright headers at the top like the following:

/* ***************************************************************** */
/* Copyright 1970, 2038                                              */
/* ***************************************************************** */

After applying a parse() + stringify() combo like the gulp-flip plugin does, the headers are all interleaved by double newlines. This can be easily reproduced with this simple test case:

var css = require('css');
var obj = css.parse('/* */\n/* */\n/* */', {});
console.log(css.stringify(obj, {}));

Which prints:

/* */

/* */

/* */