class RuboCop::Cop::Naming::BinaryOperatorParameterName

def +(other); end
# good
def +(amount); end
# bad
@example
sole parameter named ‘other`.
This cop makes sure that certain binary operator methods have their

def on_def(node) 

def on_def(node)
  op_method_candidate?(node) do |name, arg|
    add_offense(arg, message: format(MSG, opr: name)) do |corrector|
      corrector.replace(arg, 'other')
      node.each_descendant(:lvar, :lvasgn) do |lvar|
        lvar_location = lvar.loc.name
        next unless lvar_location.source == arg.source
        corrector.replace(lvar_location, 'other')
      end
    end
  end
end

def op_method?(name) 

def op_method?(name)
  return false if EXCLUDED.include?(name)
  !/\A[[:word:]]/.match?(name) || OP_LIKE_METHODS.include?(name)
end