added fix in environments.R

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dataset@149 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
change Rsocialdata0 title

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/dataset@150 edb9625f-4e0d-4859-8d74-9fd3b1da38cb