Fix misleading comment in NaN upper-bound regression test

Author: ptimizeroracle

tests/expressions/test_evaluator.py

@@ -1362,8 +1362,8 @@ def test_strict_not_equal_and_not_in_with_mixed_nans_and_matching_bounds(field_t
 def test_strict_not_in_with_nan_upper_bound(field_type: PrimitiveType) -> None:
     schema = Schema(NestedField(1, "x", field_type, required=False))
     # Column contains {1.0, NaN}: min is 1.0, max is NaN (NaN sorts greatest).
-    # No NaN stats are present, but the row 1.0 is in the literal set, so the
-    # file cannot be proven to fully match NotIn.
+    # The non-NaN row 1.0 is in the literal set, so the file cannot be proven
+    # to fully match NotIn, even though the NaN count is known.
     data_file = DataFile.from_args(
         file_path="file.parquet",
         file_format=FileFormat.PARQUET,