[zhouzh2]

A small bug:
If the lines contain some double-byte characters and line length is different, use box selection to edit the end of these lines:

【【【【【【【【【【【【【【【【【【【【

	【【【【

	【【

	【【【【【【【【【【【【【【【【【【【【【【【【【【【

	【【

Now I want to append “//” to these lines, you may find the “//”s don’t appear to be at one column.