bug#13177: 24.3.50; doc of `read-char-by-name'

[Stefan Monnier]

> I guess you mean adding a predicate that will check input
> for a valid hex number?  It could act as an union of
> character name completions and a predicate to check hex numbers.
> But I don't imagine how to combine them without adding
> a large list of all possible hex numbers to the completion list.

The completion table can be a function.


        Stefan