[texhax] A macro programming question

[Arno Trautmann]

Paul Isambert wrote:
> You can say:
>
> \def\hboxR#1#{%

I saw this kind of definition in a package and tried to understand what
it does (to change \textcolor a bit) – but I just didn’t get the meaning
of it. Could you explain shortly what the effect of #1# is? …

cheers
Arno

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