doesn't escape % in @describeIn

[MrLoh]

This code:

#' @describeIn foo shortcut for foo
`%foo%` <- function(x, y) foo(x, y)

generates the following foo.Rd

\name{foo}
\alias{\%foo\%}
\alias{foo}

 ...

\section{Functions}{
\itemize{
\item \code{%foo%}: shortcut for foo
}}

where the %s don't get escaped properly which breaks the LaTeX, as seen above.