Polish

segments.py

@@ -86,5 +86,5 @@ g.list_properties()
 print('Saving graph...')
 g.save(sys.argv[2])
 t1 = time.perf_counter()
-print(f'Done saving in {t1 - t0:.0f} s.')
+print(f'Done saving in {t1 - t0:.0f} s')
 print("Everything is cool.")