hgweb file: fixed left-justified line numbers on IE v6.0

IE (v6.0) seemed to squash the spaces surrounding the line
numbers, making them appeared as left- instead of being
right-justified.

Testing with IE v6.0 and Firefox 1.0.6.

templates/header.tmpl

@@ -8,7 +8,8 b' Content-type: text/html'
 a { text-decoration:none; }
 .parity0 { background-color: #dddddd; }
 .parity1 { background-color: #eeeeee; }
-.lineno { width: 60px; color: #aaaaaa; font-size: smaller; }
+.lineno { width: 60px; color: #aaaaaa; font-size: smaller; 
+          text-align: right; padding-right:1em; }
 .plusline { color: green; }
 .minusline { color: red; }
 .atline { color: purple; }