Fix some Rd formatting issues

man/reactivePlot.Rd

@@ -9,7 +9,7 @@ slot.}
   \item{func}{A function that generates a plot.}
 
   \item{...}{Arguments to be passed through to
-  \code{\link{grDevices::png}}.  These can be used to set
+  \code{\link[grDevices]{png}}.  These can be used to set
   the width, height, background color, etc.}
 }
 \description{

man/reactiveTable.Rd

@@ -7,10 +7,10 @@ slot.}
 }
 \arguments{
   \item{func}{A function that returns an R object that can
-  be used with \link{xtable::xtable}.}
+  be used with \code{\link[xtable]{xtable}}.}
 
   \item{...}{Arguments to be passed through to
-  \code{\link{xtable::xtable}}.}
+  \code{\link[xtable]{xtable}}.}
 }
 \description{
   The corresponding HTML output tag should be \code{div}

man/reactiveText.Rd

@@ -17,10 +17,10 @@
 }
 \details{
   The result of executing \code{func} will be printed
-  inside a \code{\link{capture.output}} call. If instead
-  you want to return a single-element character vector to
-  be used verbatim, return it wrapped in
-  \code{\link{invisible}} (or alternatively, just use
+  inside a \code{\link[utils]{capture.output}} call. If
+  instead you want to return a single-element character
+  vector to be used verbatim, return it wrapped in
+  \code{\link[base]{invisible}} (or alternatively, just use
   \code{\link{reactive}} instead of \code{reactiveText}.
 }