lib/numbering.js
function unescapeString(str) {
    let i = 0, result = '';
    const len = str.length;

    while (i < len) {
        const ch = str[i++];
        result += (ch === '\\') ? (str[i++] || '') : ch;
    }

    return result;
}
function unescapeString(str) {
    let i = 0, result = '';
    const len = str.length;

    while (i < len) {
        const ch = str[i++];
        result += (ch === '\\') ? (str[i++] || '') : ch;
    }

    return result;
}
function unescapeString ( str ) { let i = 0 , result = '' ; const len = str . length ; while ( i < len ) { const ch = str [ i ++ ] ; result += ( ch === '\\' ) ? ( str [ i ++ ] || '' ) : ch ; } return result ; }
Unescapes characters, screened with `\`, in given string
@param  {String} str
@return {String}
Unescapes characters screened with \ in given string