Start a new language with two-letter weather days, which check accepts

Following docs/TRANSLATING.md for Swedish: `i18n.py new` guessed three letters (sön mån tis) and `check` then failed
the new file on it. The guess is now two letters from the abbreviation (sö må ti, the CLDR's short width here).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tools/i18n_cldr.mjs

@@ -39,9 +39,10 @@ for (const code of codes) {
     date: {
       weekdays: [0, 1, 2, 3, 4, 5, 6].map((i) => long.format(day(i))),
       weekdays_short: [0, 1, 2, 3, 4, 5, 6].map((i) => short.format(day(i))),
-      // The narrow columns of the weather card: the short name without its dot, at most three letters ("mié", "sáb",
-      // "czw", "dom"); a screen shows no more.
-      weekdays_min: [0, 1, 2, 3, 4, 5, 6].map((i) => [...short.format(day(i)).replace(/\.$/, '')].slice(0, 3).join('')),
+      // The narrow columns of the weather card hold two letters: a first guess from the short name without its dot
+      // ("sö", "må" in Swedish, as the CLDR's short width), which the language's translator checks (tools/i18n.py keeps
+      // the list once a language has it).
+      weekdays_min: [0, 1, 2, 3, 4, 5, 6].map((i) => [...short.format(day(i)).replace(/\.$/, '')].slice(0, 2).join('')),
       months: [...Array(12).keys()].map(monthLong),
       months_short: [...Array(12).keys()].map(numericMonth ? standalone : monthShort),
       top_bar: withNames(pattern(code, { weekday: 'short', day: 'numeric', month: 'short' }, { weekday: 'weekday', day: 'day', month: 'month' })),