Improve handling of the roff(7) "\t" escape sequence:

* Parsing macro arguments has to be done in copy mode,
  which implies replacing "\t" by a literal tab character.
* Otherwise, render "\t" as the empty string, not as a 't' character.

This fixes formatting of the distfile example in the oldrdist(1) manual.
This also shows up in the unzip(1) manual as one of several issues
preventing the removal of USE_GROFF from the archivers/unzip port.
Thanks to espie@ for attracting my attention to the unzip(1) manual.

1 files changed, 1 insertions, 1 deletions

diff --git a/chars.c b/chars.c
index e7947f51..ad3ffd40 100644
--- a/chars.c
+++ b/chars.c
@@ -37,7 +37,7 @@ struct	ln {
 	int		  unicode;
 };
 
-#define	LINES_MAX	  328
+#define	LINES_MAX	  329
 
 #define CHAR(in, ch, code) \
 	{ NULL, (in), (ch), (code) },