Hello Joachim!
Good to hear from you again.
>> .TBL cols=3
>> .TR ".TD 1*2 .TD 2+3*2 colspan=2"
>> .ETB
>
> hdtbl behaves right in both of your examples. The hdtbl-manpage
> says:
>
> If a macro has one or more arguments, and it is not starting a
> line, it must be enclosed in double quotes.
>
> So you must write the second line of the first example
>
> .TR .TD 1*2 ".TD 2+3*2 colspan=2"
>
> to get the expected result.
Ah, thanks. This is not immediately obvious IMHO and needs a better
example in the man page then. Since I'm revising Bernd's recent
additions, I'll improve that also.
Werner