doc update

git-svn-id: https://svn.r-project.org/ESS/trunk@5486 0bbaf3bd-34e0-0310-bf65-c717079852d4
add missing ')'   (eh-hmm!)


git-svn-id: https://svn.r-project.org/ESS/trunk@5487 0bbaf3bd-34e0-0310-bf65-c717079852d4