hop_skip_jump never returns when there is no change in the sample

[gasriniv]

Hello,

In the line

https://github.com/Trusted-AI/adversarial-robustness-toolbox/blob/main/art/attacks/evasion/hop_skip_jump.py#L442

the while loop never terminates when the value of epsilon becomes 0.0 (on repeated divisions), as there is no change in the new sample. Could you please review the logic?

Thanks,
Ganesan