jcfaria/Vim-R-plugin — pull request #119 by dkvasnicka (2014-08-21 12:10:33+00:00)
Title: Checking that b:undo_ftplugin exists before appending to it

This plugin expects b:undo_ftplugin to exists which is not always the case. I made a very simple fix and it's very well possible that it can be written more succintly and idiomatically - but it worked for me :)