[bug #45502] [troff] .if, .ie, .el parsing incompatible with Unix V7, DWB, and Heirloom Doctools troff

[G. Branden Robinson]

Follow-up Comment #9, bug #45502 (group groff):

[comment #8 comment #8:]
> [comment #6 comment #6:]
> >   GNU troff treats a newline and EOF equivalently in this case.
> 
> Also I don't get how that's possible.  GNU troff treats a newline at the end
of an .if condition as an implied join with the following line.  If EOF
instead of newline appears here, there's no following line to join.

That was a stale comment.  I had included checks `|| tok.is_eof()` while
developing this, but backed them out.  Will fix.  (If I don't end up putting
the checks back in light of comment #8.)


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