class RuboCop::Cop::Layout::SpaceBeforeComment

def investigate(processed_source)
  processed_source.tokens.each_cons(2) do |token1, token2|
    next unless token2.comment?
    next unless token1.line == token2.line
    if token1.pos.end == token2.pos.begin
      add_offense(token2.pos, location: token2.pos)
    end
  end
end