class Rubocop::Cop::Style::FavorSprintf

literal and if the second argument is an array literal.
only two scenarios are considered - if the first argument is a string
It cannot be implemented in a reliable manner for all cases, so
This cop checks for uses of String#%.

def on_send(node) 

def on_send(node)
  receiver_node, method_name, *arg_nodes = *node
  if method_name == :% &&
      ([:str, :dstr].include?(receiver_node.type) ||
       arg_nodes[0].type == :array)
    add_offence(:convention, node.loc.selector, MSG)
  end
  super
end