On Sat, 17 Jun 2023, Douglas McIlroy wrote:
$$ is etched into my fingertips;
Mine too.
@@ is the fallback when I need to
protect $1 and the like, typically for pic code that contains its own
macros together with eqn constructs.
## has the virtue of not colliding with other eqn constructs
or with groff macro definitions. It does collide with groff
color specs and \# comments and with pic comments, so
it's not a panacea, but seems better than $$.
@@ may deserve consideration. The only collisions that
come to mind are with the esoteric groff escape \$@.and
with mentions of email addresses or shell scripts.
Unfortunately, it is visually intrusive.
Wow. That's great. Can I just use that as-in and put a reference to a
private communication.
You may also want to make a recommendation for delimiting bodies of eqn
macros. I use %%--not perfect, but any conflicting groff constructs will
be right there in full view.
Sounds like a good idea.
Thanks - Damian
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