Intl.DateTimeFormat "short" returns month with a period for "pt-pt" and "pt-br"

[rodolfo3]

• Version: >= 13.4.0
• Platform: Linux 4.15.0-1052-aws npm install is unbelievably slow, fails in certain environments #54-Ubuntu SMP Tue Oct 1 15:43:26 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
• Subsystem: Intl

It is also happening on MacOS.

I'm updating the nodejs and get some different behavior on Intl.DateTimeFormat for pt-br and pt-pt.

On 13.3.0, I get jan as result.
On 13.4.0 and later, I get jan. (with an period at the end).

To test it, I'm using this code:

node --version
node -e "console.log(new Intl.DateTimeFormat('pt-br', { month: 'short' }).format(new Date()));"

And get these results:

Now using node v13.6.0 (npm v6.13.4)
v13.6.0
jan.


Now using node v13.5.0 (npm v6.13.4)
v13.5.0
jan.


Now using node v13.4.0 (npm v6.13.4)
v13.4.0
jan.


Now using node v13.3.0 (npm v6.13.1)
v13.3.0
jan


Now using node v13.2.0 (npm v6.13.1)
v13.2.0
jan


Now using node v13.1.0 (npm v6.12.1)
v13.1.0
jan


Now using node v13.0.1 (npm v6.12.0)
v13.0.1
jan

I'm changing the versions using nvm:

$ nvm --version
0.34.0

[Hakerh400]

Bisected to 0cb7720. It is an ICU update, so probably the new behavior is correct.