How to set/append in TextArea a new/break line

I am tryin to do a simple "detail information area" where the text is growing with processing infor like:
reading.. 
Loadding..
new ID found: 1234
new ID found: 1237
Creating file xfawñeoifjwao.xml

appending values

textArea.setValue(textArea.getValue() + "\n" + toAppend)

but the new line is not happening

IDK why, I never had to do this on desktop app or even jsp, but I had to add a space before to make it work 

textArea.setValue(textArea.getValue() + " \n" + toAppend)

Obviously now I have a prefix but.. who cares..