change messages

git-svn-id: https://svn.r-project.org/R/trunk@63931 00db46b3-68df-0310-9c12-caf00c1e9a41
break over-long lines for \S4method

git-svn-id: https://svn.r-project.org/R/trunk@63932 00db46b3-68df-0310-9c12-caf00c1e9a41