class Rubocop::Cop::Style::WhileUntilModifier

if written as a modifier while/until.
Checks for while and until statements that would fit on one line

def inspect(source_buffer, source, tokens, ast, comments) 

def inspect(source_buffer, source, tokens, ast, comments)
  return unless ast
  on_node([:while, :until], ast) do |node|
    # discard modifier while/until
    next unless node.loc.end
    if check(node, comments)
      add_offence(:convention, node.loc.expression, MSG)
    end
  end
end