Ruby - 如何将单行换行改为双行换行？

Question

比方说，我有这样的一个叫做“道”文件：

If you can talk about it, it ain't Tao. If it has a name, it's just another thing.   
Tao doesn't have a name. Names are for ordinary things. 

而且我想在Ruby中打开它，并将其更改为：

If you can talk about it, it ain't Tao. If it has a name, it's just another thing. 
  
Tao doesn't have a name. Names are for ordinary things. 

我知道如何阅读文件，并获取内容到一个字符串（我们称之为tao_string），但我不知道如何将单行换行改为双行换行。我怀疑是通过正则表达式，但我不知道从哪里开始。

Answer 1

你可以用gsub做到这一点：

tao_string2 = tao_string.gsub("\n", "\n\n") 

或就地与gsub!：

tao_string.gsub!("\n", "\n\n") 

这将通过双换行符替换字符串中的所有换行符。