Add test_dir variable for path to testing directory

Author: baileydauterman

site/en/tutorials/keras/text_classification.ipynb

@@ -194,6 +194,7 @@
       "outputs": [],
       "source": [
         "train_dir = os.path.join(dataset_dir, 'aclImdb', 'train')\n",
+        "test_dir = os.path.join(dataset_dir, 'aclImdb', 'test')\n",
         "os.listdir(train_dir)"
       ]
     },
@@ -382,7 +383,7 @@
       "outputs": [],
       "source": [
         "raw_test_ds = tf.keras.utils.text_dataset_from_directory(\n",
-        "    'aclImdb/test',\n",
+        "    test_dir,\n",
         "    batch_size=batch_size)"
       ]
     },