Merge pull request d2l-ai#213 from astonzhang/nin

consistent indentation

Author: astonzhang

utils.py

@@ -59,8 +59,8 @@ def transform_mnist(data, label):
 
     mnist_train = gluon.data.vision.FashionMNIST(root=root, train=True, transform=None)
     mnist_test = gluon.data.vision.FashionMNIST(root=root, train=False, transform=None)
-	# Transform later to avoid memory explosion. 
-	train_data = DataLoader(mnist_train, batch_size, shuffle=True, transform=transform_mnist)
+    # Transform later to avoid memory explosion. 
+    train_data = DataLoader(mnist_train, batch_size, shuffle=True, transform=transform_mnist)
     test_data = DataLoader(mnist_test, batch_size, shuffle=False, transform=transform_mnist)
     return (train_data, test_data)