[3.10] gh-97709: Included newline separator in Mandelbrot set (GH-97737) (#97823)

Included newline separator in Mandelbrot set

Now the Mandelbrot set one-liner example on separates the lines with a '\n' character.
(cherry picked from commit 49802605f8e47c5c7ddc8a6cecdf4afe44765586)

Co-authored-by: matheusja <matheusjahnke@hotmail.com>