[R] Weird and changed as.roman() behavior

[Jani Välimaa]

Hello,

I don't know what's changed or how to figure out why as.roman() started
to work different way lately on Mageia Cauldron. Cauldron is the
latest development version of Mageia Linux.

Expected bahavior:
> as.roman(strrep("I", 1:5))
[1] I   II  III IV  V  

Current behavior:
> as.roman(strrep("I", 1:5))
[1] I    II   III  IV   <NA>
Warning message:
In .roman2numeric(x) : invalid roman numeral: IIIII

as.roman() doesn't handle "IIIII" -> "V" anymore and thus 'make check'
fails when building any 4.3.x or 4.4.x versions from the sources.

Any hints?

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