This stuff should be Ic not Ar.

tmux.1

@@ -1,4 +1,4 @@
-.\" $Id: tmux.1,v 1.12 2007-11-12 20:42:53 nicm Exp $
+.\" $Id: tmux.1,v 1.13 2007-11-12 20:46:46 nicm Exp $
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 .\"
@@ -297,34 +297,35 @@ Set an option. Possible options are:
 .It Ic prefix Ar key
 Set the current prefix key.
 .It Xo Ic status 
-.Op Ar on | Ar off
+.Op Ic on | Ic off
 .Xc
 Show or hide the status line.
 .It Ic status-fg Ar colour
 Set status line foreground colour, where
 .Ar colour
 is one of:
-.Ar black ,
-.Ar red ,
-.Ar green ,
-.Ar yellow ,
-.Ar blue ,
-.Ar magenta ,
-.Ar cyan ,
-.Ar white or
-.Ar default .
+.Ic black ,
+.Ic red ,
+.Ic green ,
+.Ic yellow ,
+.Ic blue ,
+.Ic magenta ,
+.Ic cyan ,
+.Ic white
+or
+.Ic default .
 .It Ic status-bg Ar colour
 Set status line backgroun colour.
 .It Xo Ic bell-action
-.Op Ar any | Ar none | Ar current
+.Op Ic any | Ic none | Ic current
 .Xc
 Set action on window bell.
-.Ar any
+.Ic any
 means a bell in any window linked to a session causes a bell in the current
 window of that session,
-.Ar none
+.Ic none
 means all bells are ignored and
-.Ar current
+.Ic current
 means only bell in windows other than the current window are ignored.
 .It Ic default-command Ar command
 Sets the command used for new windows (if not specified when the window is