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

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Author: pre-commit-ci[bot]

quantum/q_fourier_transform.py

@@ -14,6 +14,7 @@
 https://en.wikipedia.org/wiki/Quantum_Fourier_transform
 https://quantum.cloud.ibm.com/docs/en/api/qiskit/qiskit.circuit.library.QFT
 """
+
 import math
 
 import numpy as np