remove a sorta-extraneous trailing slash on contents

lib/WRT.pm

@@ -137,7 +137,7 @@ As it stands, freeverse, image, and list are not particularly robust.
 
 package WRT;
 
-our ($VERSION) = '3.0.0';
+our ($VERSION) = '3.0.1';
 
 use strict;
 use warnings;
@@ -808,13 +808,12 @@ sub list_contents {
     $linktext ||= $se;
 
     $contents .= q{ }
-              . a({ href  => $self->url_root . "$entry/$se/",
+              . a({ href  => $self->url_root . "$entry/$se",
                     title => $se },
                   $linktext);
   }
 
   return p( em('more') . ": $contents" ) . "\n";
-
 }
 
 =item icon_markup