Add support for language R.
Add support for language R.

DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom,DFreds/code-peek-atom