Fix another special extract case

test/refactor/extract_variable.py

@@ -112,3 +112,10 @@ if 1:
     #? 4 text {'new_name': 'x'}
     x = None
     x
+# -------------------------------------------------- with-tuple
+#? 4 text {'new_name': 'x'}
+x +  1, 3
+# ++++++++++++++++++++++++++++++++++++++++++++++++++
+#? 4 text {'new_name': 'x'}
+x = x +  1
+x, 3