Build invariant regexp just once

Author: nobu

lib/ffi/io/console/stty_console.rb

@@ -74,7 +74,7 @@ def noecho
   UBUNTU = 'rows (?<rows>\d+); columns (?<columns>\d+)'
 
   def winsize
-    match = _io_console_stty('-a').match(/#{IEEE_STD_1003_2}|#{UBUNTU}/)
+    match = _io_console_stty('-a').match(/#{IEEE_STD_1003_2}|#{UBUNTU}/o)
     [match[:rows].to_i, match[:columns].to_i]
   end