Implement the roff \z escape sequence, intended to output the next

character without advancing the cursor position; implement it to
simply skip the next character, as it will usually be overwritten.

With this change, the pod2man(1) preamble user-defined string \*:,
intended to render as a diaeresis or umlaut diacritic above the
preceding character, is rendered in a slightly less ugly way,
though still not correctly.  It was rendered as "z.." and is now
rendered as ".".

Given that the definition of \*: uses elaborate manual \h positioning,
there is little chance for mandoc(1) to ever render it correctly,
but at least we can refrain from printing out a spurious "z", and
we can make the \z do something semi-reasonable for easier cases.

"just commit" kristaps@

1 files changed, 2 insertions, 1 deletions

diff --git a/mandoc.h b/mandoc.h
index bd7dfdc1..5aaac54c 100644
--- a/mandoc.h
+++ b/mandoc.h
@@ -379,7 +379,8 @@ enum	mandoc_esc {
 	ESCAPE_FONTPREV, /* previous font mode */
 	ESCAPE_NUMBERED, /* a numbered glyph */
 	ESCAPE_UNICODE, /* a unicode codepoint */
-	ESCAPE_NOSPACE /* suppress space if the last on a line */
+	ESCAPE_NOSPACE, /* suppress space if the last on a line */
+	ESCAPE_SKIPCHAR /* skip the next character */
 };
 
 typedef	void	(*mandocmsg)(enum mandocerr, enum mandoclevel,