Blake McBride <bl...@mcbride.name> wrote:

> Wow.  That did fix the problem.  Can't find any documentation on it.

It is documented in the tbl man page.

The line drawing commands had been introduced for pic (AFAIK).  That may be the 
reason that \l \L is used instead of \D'l ...'.
Or that \l \L also work with nroff.  Although lines from tbl processed with 
nroff seem not to work correctly yet in Heirloom.

> What about lines in troff?

If it's your own document I suggest to use \D'l ...' instead of \l.
If it's *required* for documents you can't change it is maybe the simplest 
solution to implement that "-g" option for troff too.

   Carsten

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