Joseph Wright writes:
> Morten Høgholm wrote:
>
> [snip]
> > From l3messages:
> >
> > % \begin{macro}{\text_put_sp:}
> > % \begin{macro}{\text_put_four_sp:}
> > % We need these functions for certain error and warning messages
> > % right away. They put one and four spaces into the message stream.
> > % \begin{macrocode}
> > \def_new:Npn \text_put_sp: {~}
> > \def_new:Npn \text_put_four_sp: {\text_put_sp: \text_put_sp:
> > \text_put_sp: \text_put_sp: }
> > % \end{macrocode}
> > % \end{macro}
> > % \end{macro}
> > %
>
> As you may have guessed, I'm using source quite heavily for finding
> things I suspect may exist. \text_put_sp: is not in the "documentation"
> part of source3, so doesn't show up by default. Looking at l3messages,
> it seems there is quite a bit that doesn't make it to the "use" part. I
> shall read the implementation properly on this.
some of it is probably simply neglect, some of it is because some stuff is
more experimental or not fully thought through ...