save and load text in [textedit]

Supposedly easy but actually hard task: save a list of integers in a text file like so:

1 2 3 4

5 6 7 8

9 10 11 12

then load the same list into a [textedit].

I have achieved something close to that, but i get annoying quotes around each line. I tried [fromsymbol] and other solution but it does not work https://pastebin.com/kLzWmspt

PS no, I don't want to use [coll] instead