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

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

tests/test_interpolation.py

@@ -48,7 +48,7 @@ def f(x):
         vs = int(np.prod(value_shape))
         f_rep = np.tile(scalar_val, vs).reshape(vs, -1)
         for i in range(vs):
-            f_rep[i] += np.pi * (i+1)
+            f_rep[i] += np.pi * (i + 1)
         return f_rep
 
     u = dolfinx.fem.Function(V)