The correct syntax of the -w option does not have a space between 
the -w and the cols ... the manpage seems to imply differently though 
so let's fix it.

http://bugs.gentoo.org/show_bug.cgi?id=69660

--- a/dog.1
+++ b/dog.1
@@ -8,3 +8,3 @@
 .B dog
-[\-AbBeEnstTuv] [\-w cols] [\-l lines] 
+[\-AbBeEnstTuv] [\-w<cols>] [\-l lines] 
 [\-\-show\-all] [\-\-number\-nonblank] [\-\-no\-blanks] [\-\-bind=port]
@@ -64,3 +64,3 @@
 .TP
-.I \-w n
+.I \-w<n>
 Print first n characters of each line (default=80)