switch back to 2.2, which is recommended by http://rubyonrails.org
switch back to 2.2, which is recommended by http://rubyonrails.org

seuros/closure_tree,froderik/closure_tree,froderik/closure_tree,mceachen/closure_tree,fabien-michel/closure_tree,fabien-michel/closure_tree,seuros/closure_tree,mceachen/closure_tree,procore/closure_tree,froderik/closure_tree,mceachen/closure_tree,procore/closure_tree,fabien-michel/closure_tree,seuros/closure_tree,procore/closure_tree