String concatenation does not work if there is a point

[astickru]

If there is a "point" character in the string. Example:
try {
const r = m.runExpression('"p1. " + "p2"');
console.log('result: ', r);
} catch (err) {
console.log('error: ', err);
}

[andrewtelnov]

@astickru I have fixed it by the commit above.

Thank you,
Andrew