Swift: empty single-line comments are incorrectly colored

[alex-swiftify]

Describe the bug

Empty single-line comments (//) followed by newline are colored differently from comments that have text.

Expected Behavior

Empty // comments should be colored the same as other comments.

Current Behavior

Lines with empty // comments are (incorrectly) colored in purple:

Reproduction Steps

1. Go to https://ace.c9.io/tool/mode_creator.html
2. Select the "Swift" mode and "XCode" theme.
3. Paste the following code to the right window:

//
//  Filename.swift
//  Description
//
//  Created by Author on 05/13/2022.
//  Copyright © 2014-2023 Company. All rights reserved.
//

import Foundation
import AppKit

Possible Solution

Adding a space after // fixes the syntax coloring of an empty line.

Additional Information/Context

No response

Ace Version / Browser / OS / Keyboard layout

ACE 1.3.1 / Google Chrome / macOS Ventura 13.3.1 (a), M1 Mac, English (U.S.)