> > At the same time, I've disallowed `\s-[-...]' and friends.
>
> Why? Their previous behavior was just fine mathematically.
First of all, it isn't documented. Secondly, it creates an ambiguity:
shall the second minus character start a relative size change (within
the relative size change), or shall it start a negative number because
we already are in `relative' mode?
Disallowing this construction appears as the cleanest solution to me.
Werner
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