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Re: [groff] mark/lineup in eqn

From: Doug McIlroy
Subject: Re: [groff] mark/lineup in eqn
Date: Tue, 01 May 2018 23:40:50 -0400
User-agent: Heirloom mailx 12.5 7/5/10

Ingo suggested a way to write two equations aligned
on equals signs, to look rather like this
           shortid = expression1
    longidentifier = expression2

Here's the code
set column_sep 35
matrix {
  rcol { xhortid above longidentifier }
  ccol { = above = }
  lcol { expression1 above expression2 }

Yes, I've used this trick many times. It's impenetrable to 
read and excruciating to edit. 


In fact the matrix trick is so painful that with tongue
hardly in cheek I'd claim that for the present example
raw troff would be simpler:

shortid = expression1
longidentifier = expression2

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