fix(challenges): Change Symmetric Differences Title (#16962)
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"challenges": [
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{
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"id": "a3f503de51cf954ede28891d",
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"title": "Symmetric Difference",
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"title": "Find the Symmetric Difference",
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"description": [
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"Create a function that takes two or more arrays and returns an array of the <dfn>symmetric difference</dfn> (<code>△</code> or <code>⊕</code>) of the provided arrays.",
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"Given two sets (for example set <code>A = {1, 2, 3}</code> and set <code>B = {2, 3, 4}</code>), the mathematical term \"symmetric difference\" of two sets is the set of elements which are in either of the two sets, but not in both (<code>A △ B = C = {1, 4}</code>). For every additional symmetric difference you take (say on a set <code>D = {2, 3}</code>), you should get the set with elements which are in either of the two the sets but not both (<code>C △ D = {1, 4} △ {2, 3} = {1, 2, 3, 4}</code>). The resulting array must contain only unique values (<em>no duplicates</em>).",
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