> HTML output:
>
> A complete listing of all built-in registers can be found in see
> Register Index.
>
> Here, the "see" is superfluous. This could be attributed to misuse
> of the @ref macro in the source,
Yes.
> but then we have...
>
> PDF output:
>
> A complete listing of all built-in registers can be found in see
> tie E [Register Index], page 235.
>
> Appendix E is the correct reference but the injected "tie" screams
> out to me a mal-expanded @tie{} macro.
Copy the newest version of file `texinfo.tex` (for example, taken from
the `texinfo` git repository) to the same directory as `groff.texi`,
do a `make clean` and repeat the build of the PDF file. Maybe this
fixes it – if yes, you have an outdated or buggy `texinfo.tex`
somewhere in your TeX input file path.
Werner
