intl.datetimeformat comma removed after version 20.11.1

[dgabrielm]

Version

20.11.2+

Platform

Darwin Darios-MacBook-Pro.local 22.6.0 Darwin Kernel Version 22.6.0: Wed Oct 4 21:25:26 PDT 2023; root:xnu-8796.141.3.701.17~4/RELEASE_X86_64 x86_64

Subsystem

intl.datetimeformate

What steps will reproduce the bug?

open terminal confirm node version is above 20.11.1 node node interface runs d = new Date(Date.now()) formatted = new Intl.DateTimeFormat('en-GB', { dateStyle: 'full', timeStyle: 'medium' }).format(d)

output will show date string e.g. 'Tuesday 21 May 2024 at 09:55:02' with missing comma

If you repeat the process with 20.11.1 or below the output will be with a comma e.g. 'Tuesday, 21 May 2024 at 09:55:02'

How often does it reproduce? Is there a required condition?

every time

What is the expected behavior? Why is that the expected behavior?

output of formatted date should be (example) 'Tuesday, 21 May 2024 at 09:55:02'

What do you see instead?

I see instead (example) 'Tuesday 21 May 2024 at 09:55:02'

Additional information

No response