chronat: Allow day from month_day_last conditionally #1845
Merged
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Thanks to @MattStephanson and @statementreply on discord for mentioning these edge cases.
I originally thought that you can't get a day from
month_day_last, butit clearly makes sense, for most months. I changed some machinery around
so that we can always intercept a specifier, which means that we need to
do manual checking in the writer for localization.
This PR is more to illustrate how a specifier may be intercepted, and
that testing need only be done for specific types.