Fix String Compare

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 is_yes(text):
    return text is "yes"

{
  "expected_contains": [
    "text == \"yes\""
  ]
}