Two new low-level roff(7) features:

* .nr optional third argument (auto-increment step size)
* \n+ and \n- numerical register auto-increment and -decrement
bentley@ reported on Dec 9, 2013 that lang/sbcl(1) uses these.

1 files changed, 19 insertions, 0 deletions

diff --git a/regress/roff/nr/incr.out_ascii b/regress/roff/nr/incr.out_ascii
new file mode 100644
index 00000000..d039d5b1
--- /dev/null
+++ b/regress/roff/nr/incr.out_ascii
@@ -0,0 +1,19 @@
+NR-INCR(1)                  General Commands Manual                 NR-INCR(1)
+
+
+
+NNAAMMEE
+       nr-incr - increment a number register by accessing it
+
+DDEESSCCRRIIPPTTIIOONN
+       Roff can count by merely accessing a number register: 1 2 3
+
+       It can also change the step size: 5 7 9
+
+       It can also count down: 6 3 0 -3
+
+       Down in negative steps is up: -1 1 3 5
+
+
+
+OpenBSD                         April 10, 2018                      NR-INCR(1)