[bug #64463] [groff] subroutine "debug_with_file_and_line" defined differently in two source files

[Dave]

Follow-up Comment #5, bug #64463 (project groff):

[comment #2 comment #2:]
> `debug_with_file_and_line` is newer.
> 
>
https://git.savannah.gnu.org/cgit/groff.git/commit/?id=93ffeffd21868f64af7302cb9574240c8354c60a

If anything, I think the significant thing here is that the info "There are no
call sites for debug() [and debug_with_file_and_line()] and I don't plan for
there to be; I am adding these for developer convenience" appears in the above
commit message but in no code comments.  The name debug*() does hint at this
aspect, but in general it's worthwhile to comment intentional dead code so
that later code audits don't remove it.


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