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Re: Using '.vs 0' inside TBL macro


From: Werner LEMBERG
Subject: Re: Using '.vs 0' inside TBL macro
Date: Mon, 12 Dec 2005 21:57:07 +0100 (CET)

> Now I'm really confused.  My intention IS to get a zero vertical
> spacing.

You don't get one with groff 1.18 -- \n[.V] for devps output is *very*
small (1/72000 inch).  Anyway, it increases the vertical position
counter which probably triggers some trap (I haven't checked the code)
...

> The problem is that this does not work is used inside macro call
> that is placed inside a 'tbl' body, in V19.

... which wouldn't be triggered if there is really no vertical
movement.

> I read in the notes that '.vs 0' should have generated warning, and
> use the previous default.  [...]

You haven't tried hard enough:

  groff -ww mini.t > mini.ps

gives

   mini.t: warning: vertical spacing must be greater than 0
   ...

> I hope that you can run the example that I attached (in my original
> email) in v18 and v19 - if not - I will be happy to provide you with
> output (is Postscript OK ?) - and see the difference.

I've tested your file, and I can confirm your problem.  Doing the
replacement suggested in my first answer fixes it, giving identical
results with both 1.18 and 1.19.


    Werner




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