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

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Author: pre-commit-ci[bot]

neural_network/input_data.py

@@ -28,10 +28,12 @@
 from tensorflow.python.platform import gfile
 from tensorflow.python.util.deprecation import deprecated
 
+
 class _Datasets(typing.NamedTuple):
-    train:  "_DataSet"
-    validation:  "_DataSet"
-    test:  "_DataSet"
+    train: "_DataSet"
+    validation: "_DataSet"
+    test: "_DataSet"
+
 
 # CVDF mirror of http://yann.lecun.com/exdb/mnist/
 DEFAULT_SOURCE_URL = "https://storage.googleapis.com/cvdf-datasets/mnist/"