[Groff] original troff

[Jaap-Jan Boor]

Hi,

Quite some discussions on this list are
related to compatibility between groff and 
bell-labs' original troff.
By now it's more or less easy to get access to
original troff source code (as you probably now?)
e.g. a Unix System III source code license including
source can be retrieved from SCO's site (now Caldera?)

Also, for non-commercial use, the Solaris 8 code
can be downloaded from Sun, this includes the 
Sys V.4 troff source. 

The code however is quite unreadable, but it could
be compiled so you can run tests between groff and
original troff.

Jaap-Jan


> 
> 
> The book `Unix Text Processing' says:
> 
>   As far as we can tell by experiment, turning the escape character
>   off entirely with .eo does not affect the comment sequence \"; ...
> 
> So the following
> 
>   .eo
>   This\" is a test.
>   .ec
>   This\" is a test.
> 
> shall apparently produce
> 
>   This This
> 
> Can someone please test this with UNIX troff?  groff behaves
> differently, i.e., it yields
> 
>   This\" is a test.  This
> 
> which I consider the correct processing.  I won't change groff's
> behaviour, but I want to document the difference properly.
> 
> 
>     Werner
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