unix windows example html latex text TRUE FALSE \docType \encoding \keyword \name \author \concept \description \details \format \note \references \seealso \source \title \section \newcommand \renewcommand \examples \usage \alias \Rdversion \synopsis \RdOpts \arguments \value \acronym \bold \cite \command \dfn \dQuote \emph \file \linkS4class \pkg \sQuote \strong \var \enc \method \S3method \S4method \subsection \newcommand \renewcommand \enumerate \itemize \item \describe \if \ifelse \code \email \env \kbd \option \out \preformatted \samp \url \verb \deqn \eqn \tabular \href \figure \link \Sexpr \dontrun \special \v \var \method \S3method \S4method \l \link \dontshow \donttest \testonly