fix: updates for Basque (eu)

[eillarra]

As a reference you can take a look at moment.js, which was updated years ago by me: https://github.com/moment/moment/blob/develop/locale/eu.js

For example, "en {result}" was still in Spanish...

[fturmel]

I don't speak the language, but the changes look good to me!

[fturmel]

@eillarra can you confirm that there are no unintended behavior changes in the updated snapshot? d97aa76

[eillarra]

@fturmel snapshot looks good. There is only one thing that it is not perfect, but I don't think it is possible with the current implementation:

6 urte gutxi gorabehera barru should be 6 urte barru gutxi gorabehera

But suffix is added after result is calculated, and the 'about' (gutxi gorabehera) is added beforehand to the result, so I guess it needs to stay like this. Thanks!

[eillarra]

Keep this on hold for a moment... I only checked formatDistance, but I will check the other files too so the revision is complete. There might be a couple of small extra issues that can be solved.

[fturmel]

Great! Here's the unicode CLDR reference if needed: https://www.unicode.org/cldr/charts/44/summary/eu.html

If you change anything else, you can update the snapshot markdown file yourself by running npm run locale-snapshots.

I'm sure it's possible to reshape the formatDistance function to support the "about" form you're describing. How does this look?

if (options?.addSuffix) {
  if (options.comparison && options.comparison > 0) {
    if (token.startsWith("about")) {
      return result.replace("gutxi", "barru gutxi");
    }
    return result + " barru";
  } else {
    return "duela " + result;
  }
}

[eillarra]

@fturmel Thank you for your patience. I finally found a moment to go through all files yesterday. I added several small changes to conform to the official Basque rules.

Snapshot has been updated too and looks OK.

[eillarra]

CLDR shows both y/MM/dd and y-MM-dd:

• y/MM/dd: https://www.unicode.org/cldr/charts/44/summary/eu.html#793cd78298fbed73
• y-MM-dd: https://www.unicode.org/cldr/charts/44/summary/eu.html#439e81cebcf40890

and both are valid in Basque: https://www.euskaltzaindia.eus/dok/arauak/Araua_0037.pdf
but the dashed version is more common.

[fturmel]

https://www.unicode.org/cldr/charts/44/summary/eu.html#57dac0d1b36c1261 is probably the CLDR field to look at for this value (gregorian date format short yy/M/d)

[eillarra]

I still think y-MM-dd will be a better choice, but I can change it to y/MM/dd if you prefer.

According to the Academy of the Basque Language (Euskaltzaindia), both are valid:

[fturmel]

Fair. It's hard for a non-speaker to take a stance when things deviate from the CLDR. Maybe @date-fns/I18n-eu can chime in (and @eillarra should probably be added to this team).

[fturmel]

LGTM, thanks! Up to @kossnocorp to approve and merge, provided there are no additional comments from the i18n-eu team.