Merge blocks for the same condition

Author: nobu

test/io/console/test_io_console.rb

@@ -543,9 +543,7 @@ def test_ttyname
       File.open(ttyname) {|f| assert_predicate(f, :tty?)}
     end
   end
-end
 
-defined?(IO.console) and TestIO_Console.class_eval do
   case
   when Process.respond_to?(:daemon)
     noctty = [EnvUtil.rubybin, "-e", "Process.daemon(true)"]