class RuboCop::Cop::Lint::StringConversionInInterpolation

“result is #{something}”
# good
@example
“result is #{something.to_s}”
# bad
@example
which is redundant.
This cop checks for string conversion in string interpolation,

def autocorrect(node) 

def autocorrect(node)
  lambda do |corrector|
    receiver, _method_name, *_args = *node
    corrector.replace(
      node.source_range,
      if receiver
        receiver.source
      else
        'self'
      end
    )
  end
end

def message(node) 

def message(node)
  node.receiver ? MSG_DEFAULT : MSG_SELF
end

def on_dstr(node) 

def on_dstr(node)
  node.each_child_node(:begin) do |begin_node|
    final_node = begin_node.children.last
    next unless final_node && final_node.send_type? &&
                final_node.method?(:to_s) && !final_node.arguments?
    add_offense(final_node, location: :selector)
  end
end