Replace args by *args

src/nemu/subprocess_.py

@@ -215,7 +215,7 @@ class Popen(Subprocess):
     def __enter__(self):
         return self
 
-    def __exit__(self, exc_type, exc_val, exc_tb):
+    def __exit__(self, *args):
         if self.stdin is not None:
             self.stdin.close()
         if self.stdout is not None: