Indeting table with margin-right.

Hello, in my case I have a table created with editable grid which contains a hierarchy.

My problem is that I should indent this table with spaces and not with dots as in the given example, but I don't know how.

To obtain that array with dots I have a small rule with return an array with N dots, but if I try with " ", the result will be also " ".

 Example 1: nr=5 -> concat(repeat(ri!nr,".")) -> "....."

Example 2: nr=5 ->concat(repeat(ri!nr," "))  -> " ", what I want is "     ".

Can you help me? Even with another variant than the one I had?

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