require

# File lib/irb/locale.rb, line 86
    def require(file, priv = nil)
      rex = Regexp.new("lc/#{Regexp.quote(file)}\.(so|o|sl|rb)?")
      return false if $".find{|f| f =~ rex}

      case file
      when /\.rb$/
        begin
          load(file, priv)
          $".push file
          return true
        rescue LoadError
        end
      when /\.(so|o|sl)$/
        return super
      end

      begin
        load(f = file + ".rb")
        $".push f  #"
        return true
      rescue LoadError
        return ruby_require(file)
      end
    end