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Improvements on constructing a string

From: Heime
Subject: Improvements on constructing a string
Date: Thu, 10 Nov 2022 05:38:28 +0000 
Can one improve on this implementation that makes a string "st".

(defun chart-row (list)
  "Make row for Engine Parameters as string."
  
  (let ( (st "") )

    (while list
      (setq st (concat st (chart-cell (pop list)))))
    (setq st (concat st "\n"))

    st))
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