Fix: Return tuple ('', []) when char_list is empty to prevent ValueError (#...

lingji-yidong

2024-06-28 c880db53646ab9fd26417f4baf004ab44cc24e1a

1
2
3
4
5
6
7
8
+    plus
-    minus
/    divided
÷    divided
:    divided
×    times
*    times
·    times