===================================================================
RCS file: /cvs/mandoc/regress/roff/nr/incr.in,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -p -r1.1 -r1.2
--- mandoc/regress/roff/nr/incr.in	2018/04/10 00:52:31	1.1
+++ mandoc/regress/roff/nr/incr.in	2018/12/21 17:47:01	1.2
@@ -1,4 +1,4 @@
-.\" $OpenBSD: incr.in,v 1.1 2018/04/10 00:52:31 schwarze Exp $
+.\" $OpenBSD: incr.in,v 1.2 2018/12/21 17:47:01 schwarze Exp $
 .TH NR-INCR 1 "April 10, 2018"
 .SH NAME
 nr-incr \- increment a number register by accessing it
@@ -28,3 +28,10 @@ Down in negative steps is up:
 \n-[myr]
 \n-[myr]
 \n-[myr]
+.PP
+.nr myr 42
+Go to some other value,
+then continue incrementing with an unchanged (negative) step size:
+\n+[myr]
+\n+[myr]
+\n+[myr]