Don't test Rd2txt_options examples.

git-svn-id: https://svn.r-project.org/R/trunk@63772 00db46b3-68df-0310-9c12-caf00c1e9a41
Added no attributes guard on 'test' to ifelse scalar short-circuit.


git-svn-id: https://svn.r-project.org/R/trunk@63774 00db46b3-68df-0310-9c12-caf00c1e9a41
Put in links to old news.

git-svn-id: https://svn.r-project.org/R/trunk@63775 00db46b3-68df-0310-9c12-caf00c1e9a41
arrange to install older NEWS files

git-svn-id: https://svn.r-project.org/R/trunk@63777 00db46b3-68df-0310-9c12-caf00c1e9a41