# svn status
M       usr.bin/man/man.sh

Index: usr.bin/man/man.sh
===================================================================
--- usr.bin/man/man.sh	(revision 240291)
+++ usr.bin/man/man.sh	(working copy)
@@ -576,7 +576,7 @@
 	local sizes
 
 	unset use_width
-	case "$MANWIDTH" in
+	case "${MANWIDTH-tty}" in
 	[0-9]*)
 		if [ "$MANWIDTH" -gt 0 2>/dev/null ]; then
 			use_width=$MANWIDTH