Test the handling of some additional one-character escape sequences

that take no argument and are ignored: \% \& \^ \a \d \t \u \{ \| \}
No change to parsing or formatting needed.

3 files changed, 43 insertions, 13 deletions

diff --git a/regress/roff/esc/ignore.in b/regress/roff/esc/ignore.in
index 48507f44..5d31614e 100644
--- a/regress/roff/esc/ignore.in
+++ b/regress/roff/esc/ignore.in
@@ -1,12 +1,22 @@
-.\" $OpenBSD: ignore.in,v 1.3 2017/07/04 14:53:27 schwarze Exp $
-.TH ESC-IGNORE 1 "December 15, 2018"
+.\" $OpenBSD: ignore.in,v 1.5 2022/05/20 12:30:33 schwarze Exp $
+.TH ESC-IGNORE 1 "May 20, 2022"
 .SH NAME
 esc-ignore \- ignored roff escape sequences
 .SH DESCRIPTION
 .nf
-closing parenthesis: a\)b\[)]c
-comma: a\,b\[,]c
-slash: a\/b\[/]c
+percent (hyphenation allowed): a\%b\[%]c
+ampersand (zero width space): a\&b\[&]c
+closing parenthesis (ZWS transparent to EOS): a\)b\[)]c
+comma (left italic correction): a\,b\[,]c
+slash (right italic correction): a\/b\[/]c
+caret (1/12 em space): a\^b\[^]c
+a (leader): a\ab\[a]c
+d (half line feed): a\db\[d]c
+t (horizontal tab): a\tb\[t]c
+u (half reverse line feed): a\ub\[u]c
+opening brace: a\{b\[{]c
+bar (1/6 em space): a\|b\[|]c
+closing brace: a\}b\[}]c
 multiform: a\kxb\k(xyc\k[xyz]d
 quoted: a\R'myreg 0'b\R'myreg \A'y'0'c
 sizes: a\s0b\s(12c\s[123]d\s'123'e\s'1\w'xy'2'f
diff --git a/regress/roff/esc/ignore.out_ascii b/regress/roff/esc/ignore.out_ascii
index 536fc245..5d98db9d 100644
--- a/regress/roff/esc/ignore.out_ascii
+++ b/regress/roff/esc/ignore.out_ascii
@@ -4,12 +4,22 @@ NNAAMMEE
        esc-ignore - ignored roff escape sequences
 
 DDEESSCCRRIIPPTTIIOONN
-       closing parenthesis: abc
-       comma: abc
-       slash: abc
+       percent (hyphenation allowed): abc
+       ampersand (zero width space): abc
+       closing parenthesis (ZWS transparent to EOS): abc
+       comma (left italic correction): abc
+       slash (right italic correction): abc
+       caret (1/12 em space): abc
+       a (leader): abc
+       d (half line feed): abc
+       t (horizontal tab): abc
+       u (half reverse line feed): abc
+       opening brace: abc
+       bar (1/6 em space): abc
+       closing brace: abc
        multiform: abcd
        quoted: abc
        sizes: abcdef
        signed sizes: abcdef
 
-OpenBSD                        December 15, 2018                 ESC-IGNORE(1)
+OpenBSD                          May 20, 2022                    ESC-IGNORE(1)
diff --git a/regress/roff/esc/ignore.out_lint b/regress/roff/esc/ignore.out_lint
index 78150f4d..16d64a97 100644
--- a/regress/roff/esc/ignore.out_lint
+++ b/regress/roff/esc/ignore.out_lint
@@ -1,4 +1,14 @@
-mandoc: ignore.in:7:26: WARNING: invalid escape sequence: \[)]
-mandoc: ignore.in:8:12: WARNING: invalid escape sequence: \[,]
-mandoc: ignore.in:9:12: WARNING: invalid escape sequence: \[/]
-mandoc: ignore.in:13:56: WARNING: invalid escape sequence: \s-
+mandoc: ignore.in:7:36: WARNING: invalid escape sequence: \[%]
+mandoc: ignore.in:8:35: WARNING: invalid escape sequence: \[&]
+mandoc: ignore.in:9:51: WARNING: invalid escape sequence: \[)]
+mandoc: ignore.in:10:37: WARNING: invalid escape sequence: \[,]
+mandoc: ignore.in:11:38: WARNING: invalid escape sequence: \[/]
+mandoc: ignore.in:12:28: WARNING: invalid escape sequence: \[^]
+mandoc: ignore.in:13:17: WARNING: invalid escape sequence: \[a]
+mandoc: ignore.in:14:25: WARNING: invalid escape sequence: \[d]
+mandoc: ignore.in:15:25: WARNING: invalid escape sequence: \[t]
+mandoc: ignore.in:16:33: WARNING: invalid escape sequence: \[u]
+mandoc: ignore.in:17:20: WARNING: invalid escape sequence: \[{]
+mandoc: ignore.in:18:25: WARNING: invalid escape sequence: \[|]
+mandoc: ignore.in:19:20: WARNING: invalid escape sequence: \[}]
+mandoc: ignore.in:23:56: WARNING: invalid escape sequence: \s-