Fix tab probem

NIH-Chest-X-ray-dataset.py

@@ -115,13 +115,13 @@ class ChestXray14(datasets.GeneratorBasedBuilder):
 	def _info(self):
 		if self.config.name == "image-cllassification":
 	            features = datasets.Features(
-			{
-			"image": datasets.Image(),
-			"labels": datasets.features.Sequence(
-			   datasets.features.ClassLabel(num_classes=len(_NAMES), 
-							names=_NAMES)
-			 )
-			}
+                          {
+			      "image": datasets.Image(),
+			      "labels": datasets.features.Sequence(
+			             datasets.features.ClassLabel(num_classes=len(_NAMES), 
+							          names=_NAMES)
+			                        )
+			  }
 		    )
 		    keys = ("image", "labels")