fix: shuffleArray returns the same array #38
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The shuffleArray function sometimes returns the same array even after shuffling.
This pull request fixes this issue.
However, if the array has only one element, it returns the original array.
Also, if all elements in the array are the same, it returns the original array.
In other cases, it loops until the shuffled array is different from the original array.
To be safe, a maximum number of attempts is set.