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

[G. Branden Robinson]

Follow-up Comment #13, bug #45502 (group groff):

I have a better exhibit.


$ cat EXPERIMENTS/truncated-if4.roff
.nm 1
@
.if 0
A
.if !0
B
.ie 0
C
.el
D
E
.pl \n(nlu
$ cd ~/heirloom/
$ ./bin/nroff truncated-if4.roff 
  1 @ A

  2 B C

  3 D E
$ cd ~/dwb
$ DWBHOME=. ./bin/nroff truncated-if4.roff 
  1 @ A

  2 B C

  3 D E
$ ~/groff-stable/bin/nroff EXPERIMENTS/truncated-if4.roff
  1 @

  2 B

  3 D E




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