progress_bar("#", 0) ➞ "|          | Progress: 0%"

progress_bar("=", 40) ➞ "|====      | Progress: 40%"

progress_bar("#", 60) ➞ "|######    | Progress: 60%"

self.assertEqual(progress_bar("#", 0), "|          | Progress: 0%")
self.assertEqual(progress_bar("=", 40), "|====      | Progress: 40%")
self.assertEqual(progress_bar("#", 60), "|######    | Progress: 60%")
self.assertEqual(progress_bar(">", 100), "|>>>>>>>>>>| Completed!")
self.assertEqual(progress_bar("*", 100), "|**********| Completed!")

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