Apply Black code formatting

Author: github-actions[bot]

scripts/mpi_running.py

@@ -12,6 +12,7 @@
 seed = 8422
 np.random.seed(seed)
 
+
 def parallel_eig(diag, off_diag, nprocs):
     print("Spawning a communicator")
     comm = MPI.COMM_SELF.Spawn(sys.executable, args=["scripts/run.py"], maxprocs=nprocs)
@@ -87,4 +88,4 @@ def compute_eigvals(A, n_procs):
 print(f"The maximum error between real and computed eigenvalues is {max_error}")
 
 if max_error < 1e-8:
-    print("Pretty small, huh?")
+    print("Pretty small, huh?")