class RuboCop::Cop::RSpec::EmptyLineAfterSubject

let(:foo) { bar }
subject(:obj) { described_class }
# good
let(:foo) { bar }
subject(:obj) { described_class }
# bad
@example
Checks if there is an empty line after subject block.

def on_block(node) 

def on_block(node)
  return unless subject?(node)
  return unless inside_example_group?(node)
  missing_separating_line_offense(node) do |method|
    format(MSG, subject: method)
  end
end