Fix mislabelling (PR#16060)

git-svn-id: https://svn.r-project.org/R/trunk@66934 00db46b3-68df-0310-9c12-caf00c1e9a41
chisq.test example change.

git-svn-id: https://svn.r-project.org/R/trunk@66935 00db46b3-68df-0310-9c12-caf00c1e9a41