How to escape newline charaters when indexing Unicode document?

Hi guys.

I'm trying to index a Unicode document with the newlines, example:

Con cò bé bé
Nó đậu cành tre
Đi không hỏi mẹ ....

After I index into Elasticsearch, the data has no newlines anrymore:

Con cò bé bé Nó đậu cành tre Đi không hỏi mẹ ....

Anybody can help me to solve this ?

Thanks.

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