Adjust cellspacing attribute of the navigation bar tables to get some

space between cells on all (major) browsers.

Doc/perl/l2hinit.perl

@@ -112,7 +112,7 @@ $BLANK_ICON = "\n<td>" . img_tag('blank.' . $IMAGE_TYPE) . "</td>";
 $NAV_BGCOLOR = " bgcolor=\"#99CCFF\"";
 
 sub make_nav_panel{
-    ("<table width=\"100%\" cellpadding=0 cellspacing=0>\n<tr>"
+    ("<table width=\"100%\" cellpadding=0 cellspacing=2>\n<tr>"
      . "\n<td>$NEXT</td>"
      . "\n<td>$UP</td>"
      . "\n<td>$PREVIOUS</td>"