Fix Loop Condition

The model receives the prompt (and optional system message). The run uses scorer contains_all with the JSON configuration below. Pass/fail and partial credit are determined entirely by that scorer against the model output; no human grading.

Fix the bug and return corrected Python code only.

def find_first_even(nums):
    for n in nums:
        if n % 2 == 1:
            return n
    return None

{
  "expected_contains": [
    "if n % 2 == 0",
    "return None"
  ]
}