Introduce the concept of nodes that are semantically transparent:

they are skipped when looking for previous or following high-level
macros.  Examples include roff(7) .ft, .ll, and .ta, mdoc(7) .Sm
and .Tg, and man(7) .DT and .PD.  Use this concept for a variety
of improved decisions in various validators and formatters.

While here,
* remove a few const qualifiers on struct arguments that caused trouble;
* get rid of some more Yoda notation in the vicinity;
* and apply some other stylistic improvements in the vicinity.

I found this class of issues while considering .Tg patches from kn@.

1 files changed, 28 insertions, 0 deletions

diff --git a/regress/man/IP/bullet.out_utf8 b/regress/man/IP/bullet.out_utf8
new file mode 100644
index 00000000..fa021fd5
--- /dev/null
+++ b/regress/man/IP/bullet.out_utf8
@@ -0,0 +1,28 @@
+IP-BULLET(1)                General Commands Manual               IP-BULLET(1)
+
+
+
+NNAAMMEE
+       IP-bullet - bullet lists
+
+DDEESSCCRRIIPPTTIIOONN
+       BEGINTEST
+
+       *  one
+
+       *  two
+
+       •  three
+
+       •  four
+
+       -  five
+
+       -  six
+
+       ENDTEST
+       end of file
+
+
+
+OpenBSD                        February 20, 2020                  IP-BULLET(1)