class RuboCop::Cop::Lint::FormatParameterMismatch

def percent?(node)
  receiver_node, method_name, *arg_nodes = *node
  percent = method_name == :% &&
            (STRING_TYPES.include?(receiver_node.type) ||
             arg_nodes[0].array_type?)
  if percent && STRING_TYPES.include?(receiver_node.type)
    return false if heredoc?(node)
  end
  percent
end