Solve pylint issues

Author: hunterhector

texar/torch/run/metric/classification.py

@@ -136,7 +136,7 @@ def class_id(self):
         return self._class_id
 
     def better(self, cur: Value, prev: Value) -> Optional[bool]:
-        #pylint: disable=unused-argument
+        # pylint: disable=unused-argument
         # Always return `None` to indicate values are uncomparable.
         return None
 

texar/torch/run/metric/summary.py

@@ -164,7 +164,7 @@ def value(self) -> float:
         return self.optimizer().param_groups[self.group]['lr']  # type: ignore
 
     def better(self, cur: float, prev: float) -> Optional[bool]:
-        #pylint: disable=unused-argument
+        # pylint: disable=unused-argument
         # Always return `None` to indicate values are uncomparable.
         return None