Format code with black

This commit fixes the style issues introduced in 2271609 according to the output
from black.

Details: https://deepsource.io/gh/MilesCranmer/PySR/transform/3742733a-99b2-4e9e-aca9-3d3329a94a3d/

benchmarks/print_best_model.py

@@ -101,8 +101,6 @@ for trial in clean_trials:
             except AttributeError:
                 value = [arg.obj for arg in possible_args[value].pos_args]
 
-
         params[k] = value
 
     pp.pprint({"loss": loss, "params": params})
-