Follow-up Comment #15, bug #59962 (group groff):
[comment #6 comment #6:]
> grotty(1), the output driver for terminal devices--has no way to
> query the terminal device regarding its repertoire of supported
> glyphs or Unicode code points[1].
>
> [1] People familiar with groff may wonder about this claim given
> the existence of '.if c', '.fchar', and similar. As I understand
> it, these work at the interface between groff language input and
> the output driver.
Bug #65403 requests that this point be documented more clearly.
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