gdrens

I use rxvt, this terminal is VT100 standard, if you mean to ask this. unicode (0x2500-0x257F) only occupies one character position in my terminal, but I have not tested it...

Yes, I know, but in the unicode specification, the screen width occupied by the tab character 0x2500～0x257F should be 1, but now the returned value is 2 > — >...