Several [[ikiwiki/PreprocessorDirective]]s take ikiwiki-formatted text as arguments,
such as the `then` and `else` arguments of the new `if` directive, or the
`desc` argument of the `shortcut` directive.  However, smileys do not work in
these arguments.

Since the arguments to [[ikiwiki/PreprocessorDirective]]s might use the same syntax as
smileys for a different meaning, smiley substitution should not happen until
after [[ikiwiki/PreprocessorDirective]]s.

--[[JoshTriplett]]

> Sorry, I should have filed this under [[bugs]], not [[todo]].
>
> Also, for an example of this issue, consider the sample conditional on [[plugins/conditional]].
>
> --[[JoshTriplett]]

[[todo/done]] --[[Joey]]
