+>> I hadn't even realized that I was nesting ifs inside else clauses,
+>> sorry. I think you're also right about the safety of the key, after
+>> all it only gets interpolated with known, safe strings.
+
+>> The question is what to do for pages that do not have a description
+>> (and are not the index). With your proposal, the Atom feed subtitle
+>> would turn up empty. We could make it conditional in the default
+>> template, or we could have `$desc` default to `$title` if nothing
+>> else is provided, but at this point I see no reason to _not_ allow
+>> the user to choose a way to build a default description.
+