The description states first character must be picked from: alpha, underscore.... Your code doesn't allow for the first character to be an underscore, hence the "expected: true, instead got: false"
first character must be picked from: alpha, underscore...
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The description states
first character must be picked from: alpha, underscore.... Your code doesn't allow for the first character to be an underscore, hence the "expected: true, instead got: false"