class RuboCop::Cop::Performance::CaseWhenSplat

def new_branch_without_then(node, new_condition)
  new_branch = "\n#{indent_for(node)}when #{new_condition}\n"
  if node.body
    "#{new_branch}#{indent_for(node.body)}#{node.body.source}"
  else
    new_branch
  end
end