
List Beautify

Let's assume, you are given an array of arrays of positive/negative integer/float numbers, for example - [[1, 2, 10, 150], [10, 2, 1000, 2], [1, 120, 1, 1000]]. It's always correctly filled: has at least one non-empty inner array.
When you print it as a single object, you receive
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[[1, 2, 10, 150], [10, 2, 1000, 2], [1, 120, 1, 1000]] |
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[1, 2, 10, 150] [10, 2, 1000, 2] [1, 120, 1, 1000] |
Your function should return something from both views and improved:...
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