Question: worksheet save bug - anyone help please, would really be appreciated!

Okay I don't know why, but at some point my document went crazy somehow, so I closed it and when I opened it again it was like this ... the whole document, all what I had made, it was in one single line... =/


Just like this:


Can anyone help? Please... if I copy paste it to like word, I get it all shown, so it IS there..


Thanks a lot ..



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