I’ve seen this error on Julia 1.10.2 and 1.10.4. The simple test case to reproduce this is to fire up Julia in command prompt and create a variable test=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30]. The output is shown below. Note the junk character between 13 and 19.