+<title><:= $source :> source code</title>
+<meta name="description" content="<:=
+ $source ? "Source code of local $source file"
+ . ", with syntax highlighted and references linked."
+ : 'Index of source files for this site.'
+:>">
+<meta name="keywords" content="sheet, cheat, source, code, perl, plp, html, agpl">