Some language changes.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@183 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Modified formatting and language.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/eventstudies@184 edb9625f-4e0d-4859-8d74-9fd3b1da38cb