unlet TreeDirNode.openInNewTab since we are overriding it
unlet TreeDirNode.openInNewTab since we are overriding it

Older versions of vim require you to unlet a dictionary function if you
are replacing it (i.e. overriding it in a prototype OO scenario). The
unlet call got lost in the recent refactoring.

tschundler/dotfiles,iff/dotfiles-old,nywilken/dotfiles,iff/dotfiles-old,tschundler/dotfiles,nywilken/dotfiles,tschundler/dotfiles