Fix tab and spaces prob

NIH-Chest-X-ray-dataset.py

@@ -114,14 +114,14 @@ 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)
-			                        )
-			  }
+		    features = datasets.Features(
+		        "image": datasets.Image(),
+  		        "labels": datasets.features.Sequence(
+                                     datasets.features.ClassLabel(
+					num_classes=len(_NAMES),
+					names=_NAMES
+			  	     )
+	    	                  )
 		    )
 		    keys = ("image", "labels")