[pre-commit.ci] auto fixes from pre-commit.com hooks

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docs/fifty/snippet/8_perfect_bridge_hand.py

@@ -1,13 +1,17 @@
 # --8<-- [start:solution1]
-from math import factorial
 from fractions import Fraction
+from math import factorial
 
 
 def calc_prob():
     prob = 4
     for i in range(13):
-        print(i, 13-i)
-        numerator = (13 - i) * Fraction(factorial(39 - 3 * i), factorial(3) * factorial(36 - 3 * i))
-        denominator = Fraction(factorial(52 - 4 * i), factorial(4) * factorial(48 - 4 * i))
+        print(i, 13 - i)
+        numerator = (13 - i) * Fraction(
+            factorial(39 - 3 * i), factorial(3) * factorial(36 - 3 * i)
+        )
+        denominator = Fraction(
+            factorial(52 - 4 * i), factorial(4) * factorial(48 - 4 * i)
+        )
         prob *= Fraction(numerator, denominator)
     return prob