Array.join(“\n”) not the way to join with a newline?

Yes, but if you print that string out it will have newlines in it:

irb(main):001:0> a = (1..4).to_a
=> [1, 2, 3, 4]
irb(main):002:0> a.join("\n")
=> "1\n2\n3\n4"
irb(main):003:0> puts a.join("\n")
1
2
3
4

So it does appear to achieve what you desire (?)

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