edit html in tinymce does not convert \n to line breaks

When i set the content to 'a\nb' in tinymce, the edit in html shows 'ab', and when i set it again, thr开发者_StackOverflow社区ough console. it shows as

a
b

why could this be happening? and how to fix it?

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This might be because of of the cleanup functionality of tinymce. Using html will yield html without tinymce internal elements/attributs and cleaned content.