将文本从一个文件传输到另一个文件,但无意中转换为中文?

所以我做这件事是作为学习Ruby the Hard Way练习17学习练习2的一部分。本打算打开一个.txt文件,将内容转移到下面的.txt文件中。

测试.rb 在命令行中输入:ruby测试.rb测试.txt测试B.txt

from_file, to_file = ARGV

open(from_file) do |f|
  var = f.read
  puts var
  open(to_file, "w"){|t| t.write(var)}
end

This is a test 
This becomes Chinese no matter what
This is English again
This becomes Chinese again

This is a test 
਍吀栀椀猀 戀攀挀漀洀攀猀 䌀栀椀渀攀猀攀 渀漀 洀愀琀琀攀爀 眀栀愀琀ഀഀ
This is English again
਍吀栀椀猀 戀攀挀漀洀攀猀 䌀栀椀渀攀猀攀 愀最愀椀渀