chore: fix style

Author: jonas-eschle

lib/matplotlib/cbook.py

@@ -2381,6 +2381,7 @@ def _is_jax_array(x):
         # may have arbitrary user code, so we deliberately catch all exceptions
         return False
 
+
 def _is_tensorflow_array(x):
     """Check if 'x' is a TensorFlow Tensor or Variable."""
     try:

lib/matplotlib/tests/test_cbook.py

@@ -996,6 +996,7 @@ def __array__(self):
     # is the same Python object, just the same values.
     assert_array_equal(result, data)
 
+
 def test_unpack_to_numpy_from_tensorflow():
     """
     Test that tensorflow arrays are converted to NumPy arrays.