Fix incorrect indentation

Signed-off-by: Werner Lewis <[email protected]>

tests/scripts/generate_bignum_tests.py

@@ -156,7 +156,7 @@ def val_desc(val) -> str:
     def get_value_pairs(cls) -> Iterator[Tuple[str, ...]]:
         """Generate value pairs."""
         for pair in list(
-            itertools.combinations(cls.input_vals, 2)
+                itertools.combinations(cls.input_vals, 2)
             ) + cls.input_cases:
             yield pair