Never apply string formatting to generated errors with util.Abort.
Otherwise error messages containing % chars yield errors or worse.
Fixed (hopefully) all users of util.Abort.
#header#
<title>Mercurial repositories index</title>
</head>
<body>
<h2>Mercurial Repositories</h2>
The specified repository "#repo|escape#" is unknown, sorry.
Please go back to the main repository list page.
#footer#