K 10
svn:author
V 4
bapt
K 8
svn:date
V 27
2020-09-01T14:52:39.413374Z
K 7
svn:log
V 282
diff: always properly kill pr(1)

When diff is invoked with -l it will spawn the pr(1) program.
In some circumpstances the pr(1) was not properly killed when diff program
exits.

Submitted by:	Bret Ketchum
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D26232

END