# File lib/pry/indent.rb, line 316
    def screen_size
      [
         # io/console adds a winsize method to IO streams.
         $stdout.tty? && $stdout.respond_to?(:winsize) && $stdout.winsize,

         # Some readlines also provides get_screen_size.
         Readline.respond_to?(:get_screen_size) && Readline.get_screen_size,

         # Otherwise try to use the environment (this may be out of date due
         # to window resizing, but it's better than nothing).
         [ENV["ROWS"], ENV["COLUMNS"],

         # If the user is running within ansicon, then use the screen size
         # that it reports (same caveats apply as with ROWS and COLUMNS)
         ENV['ANSICON'] =~ /\((.*)x(.*)\)/ && [$2, $1]
        ]
      ].detect do |(_, cols)|
        cols.to_i > 0
      end
    end