9.2.5 ResolveLocale 13.f.ii only considers zero or one 'type' subtag

[vanwagonet]

ResolveLocale cannot accept some valid calendars in a u-ca- extension, because it only considers a key subtag followed by zero or one type subtags. RFC 6067 allows for "zero or more" type subtags to make the keyword.

In the current spec the following calendar identifiers are incorrectly matched:

• ethiopic-amete-alem is an alias for ethioaa, but will be matched as ethiopic.
• islamic-civil replaces the deprecated islamicc, but will be matched as islamic.
• islamic-umalqura, islamic-tbla, and islamic-rgsa will each be matched as islamic.

[vanwagonet]

Thanks @caridy!

[jungshik]

Has a test been added for this? An indirect test would be possible with by checking the value of 'calendar' option. For instance, something like this can be used to test.

 var options = Intl.DateTimeFormat("ar-u-ca-islamic-civil").resolvedOptions();
 assertEquals(options.calendar, "islamic-civil");