Re: Question about @tie{}

[Karl Berry]

    I don't understand neither the behaviour nor the source comment.
    What is the idea behind it?  

Avoiding expansion of $keywords$ on www.gnu.org, basically.
See the "CVS Keywords in Web Pages" node in maintain.texi.

    If nobody objects, I remove the call of cm_w() for XML/HTML/DocBook
    targets and let insert a   (=  ) directly.

I agree that the nobreak space is the way to go for *ML.  Glad you noticed.

For HTML, is   more portable (in practice) than   or  ?
Maybe it doesn't matter, so we might as well do the same for all.

Thanks,
karl