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regex template engine delete carriage return

I'm using this template engine:

https://github.com/krasimir/absurd/blob/master/lib/processors/html/helpers/TemplateEngine.js

from blog:

http://krasimirtsonev.com/blog/article/Javascript-template-engine-in-just-20-line

const templateEngine = (html, options = {}) => {
let re = /<%(.+?)%>/g,
reExp = /(^( )?(var|if|for|else|switch|case|break|{|}|;))(.*)?/g,
code = 'with(obj) { var r=;n',
cursor = 0,
result,
match;
const add = function(line, js) {
js? (code += line.match(reExp) ? line + 'n' : 'r.push(' + line + ');n') :
(code += line != '' ? 'r.push("' + line.replace(/"/g, '\"') + '");n' : '');
return add;
};
while(match = re.exec(html)) {
add(html.slice(cursor, match.index))(match[1], true);
cursor = match.index + match[0].length;
}
add(html.substr(cursor, html.length - cursor));
code = (code + 'return r.join(""); }').replace(/[rtn]/g, ' ');
try {
result = new Function('obj', code).apply(options, [options]);
} catch(err) {
/*
Don't show error when variable is not found, because will be reemplaced with empty string
console.error("'" + err.message + "'", " in nnCode:n", code, "n");

*/
}
return result;
};


but my problem i'm not using it with HTML, but with two simple textarea, a textarea template, and another for the result, the problem is this code, delete the n carriage return

i've tried change this line:

code = (code + 'return r.join(""); }').replace(/[rtn]/g, ' ');


with

code = (code + 'return r.join(""); }');


but i get one simple line; just testing with two lines without variables it's not working.

Example:
line1
my line 2

Result (no break line!):
line1 my line 2

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