class RDoc::RI::Driver

def expand_class klass
  class_names = classes.keys
  ary = class_names.grep(Regexp.new("\\A#{klass.gsub(/(?=::|\z)/, '[^:]*')}\\z"))
  if ary.length != 1 && ary.first != klass
    if check_did_you_mean
      suggestion_proc = -> { DidYouMean::SpellChecker.new(dictionary: class_names).correct(klass) }
      raise NotFoundError.new(klass, suggestion_proc)
    else
      raise NotFoundError, klass
    end
  end
  ary.first
end