[bug #59290] add register to enable/disable backtraces on diagnostics

[G. Branden Robinson]

Update of bug #59290 (project groff):

                  Status:               Postponed => None                   

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Follow-up Comment #5:

I think I have it.


backtrace.


...with the trailing dot, following Kernighan's addition of `c.` to
device-independent troff (1981).

There is no need to add a counterpart read-only, leading-dot register like
`.c`.  I think Kernighan's idea was that that register didn't need to be
read-only in the first place.

Un-postponing, but not sure when I will work on this.


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