The .AT, .DT, and .UC macros are allowed inside next-line scope

and never produce output at the place of their invocation.

Minibugs found while investigating unrelated afl(1) reports from tb@.

3 files changed, 24 insertions, 0 deletions

diff --git a/regress/man/AT/Makefile b/regress/man/AT/Makefile
new file mode 100644
index 00000000..44cf0519
--- /dev/null
+++ b/regress/man/AT/Makefile
@@ -0,0 +1,5 @@
+# $OpenBSD: Makefile,v 1.1 2022/04/27 17:04:15 schwarze Exp $
+
+REGRESS_TARGETS	 = basic
+
+.include <bsd.regress.mk>
diff --git a/regress/man/AT/basic.in b/regress/man/AT/basic.in
new file mode 100644
index 00000000..35eb2375
--- /dev/null
+++ b/regress/man/AT/basic.in
@@ -0,0 +1,10 @@
+.\" $OpenBSD: basic.in,v 1.1 2022/04/27 17:04:15 schwarze Exp $
+.TH AT-BASIC 1 "April 27, 2022"
+.SH NAME
+AT-basic \- the AT&T footer macro
+.SH DESCRIPTION
+initial text
+.B
+.AT
+bold text
+final text
diff --git a/regress/man/AT/basic.out_ascii b/regress/man/AT/basic.out_ascii
new file mode 100644
index 00000000..962c9f88
--- /dev/null
+++ b/regress/man/AT/basic.out_ascii
@@ -0,0 +1,9 @@
+AT-BASIC(1)                 General Commands Manual                AT-BASIC(1)
+
+NNAAMMEE
+       AT-basic - the AT&T footer macro
+
+DDEESSCCRRIIPPTTIIOONN
+       initial text bboolldd tteexxtt final text
+
+7th Edition                     April 27, 2022                     AT-BASIC(1)