[Rd] suggestion for small change to pdf.Rd

[Stephen Eglen]

Here is a patch against 
https://svn.r-project.org/R/trunk/src/library/grDevices/man/pdf.Rd
to make description of defaults more consistent.

Stephen

--- pdf.Rd~	2011-06-30 15:24:30.000000000 +0100
+++ pdf.Rd	2011-06-30 15:35:18.000000000 +0100
@@ -64,7 +64,7 @@
     points.  Defaults to \code{12}.}
   \item{pagecentre}{logical: should the device region be centred on the
     page? -- is only relevant for \code{paper != "special"}.  Defaults
-    to true.}
+    to \code{TRUE}.}
   \item{colormodel}{a character string describing the color model:
     currently allowed values are \code{"rgb"}, \code{"gray"} and
     \code{"cmyk"}.  Defaults to \code{"rgb"}.}
@@ -79,7 +79,7 @@
   \item{useKerning}{logical.  Should kerning corrections be included in
     setting text and calculating string widths?  Defaults to \code{TRUE}.}
   \item{fillOddEven}{logical controlling the polygon fill mode:  see
-    \code{\link{polygon}} for details.  Default \code{FALSE}.}
+    \code{\link{polygon}} for details.  Defaults to \code{FALSE}.}
   \item{maxRasters}{integer.  The maximum number of raster images that
     can be stored in this PDF document.  Defaults to \code{64L}.}
   \item{compress}{logical.  Should PDF streams be generated with Flate