Decompress wrong with data JSON.stringify

[tackelua]

Code

var jsscompress = require("js-string-compression");

var raw_text = `{"data":"test"}`;

var hm = new jsscompress.Hauffman();
var compressed = hm.compress(raw_text);

console.log("before compressed: " + raw_text);
console.log("length: " + raw_text.length);
console.log("length: " + compressed.length);

console.log("decompressed: " + hm.decompress(compressed));

Output

before compressed: {"data":"test"}
raw length: 15
compressed length: 17
decompressed: {"data":"test"}t
decompressed length: 16

Expected:

before compressed: {"data":"test"}
raw length: 15
compressed length: <=15
decompressed: {"data":"test"}
decompressed length: 15

In this case, compressed length > before compressed!