bug#43231: 27.1; hexl-insert-hex-char on an empty file "hexl-current-address: Point is not on a character in the file".

[Daniel Martín]

Eli Zaretskii <eliz@gnu.org> writes:
>
> Feel free to suggest a better message.

Is there any operation that hexl-mode provides that makes sense when the
buffer is empty? If not, then maybe we could refuse to enable hexl-mode
in an empty buffer, and print a descriptive message.

--
Daniel Martín