class RuboCop::Cop::Style::MultilineTernaryOperator

This cop checks for multi-line ternary op expressions.

def on_if(node) 

def on_if(node)
  loc = node.loc
  # discard non-ternary ops
  return unless loc.respond_to?(:question)
  add_offense(node, :expression) if loc.line != loc.colon.line
end