Fix lint errors

Author: xuzhenqi

onnxscript/rewriter/pattern.py

@@ -959,7 +959,7 @@ def _match_node(self, pattern_node: NodePattern, node: ir.Node) -> bool:
 
         self._matched[pattern_node] = node
 
-        # Note: Need to revisit this to handle optional trailing inputs better. 
+        # Note: Need to revisit this to handle optional trailing inputs better.
         if len(node.inputs) != len(pattern_node.inputs):
             return self.fail("Input nums mismatch. {len(node.inputs)} vs {len(pattern_node.inputs)}")