patch_obj.toString blows up with emojis

[d4rkr00t]

encodeURI blows up for some patch_obj:

diff-match-patch/javascript/diff_match_patch_uncompressed.js

Line 2186 in a6367d7

diff_match_patch.patch_obj.prototype.toString = function() {

Example:

let diff_match_patch = require("diff-match-patch");

let text1 = "🅱";
let text2 = "🅰";

let diff = new diff_match_patch();
console.log(diff.patch_toText(diff.patch_make(text1, text2)));