19c19,21
<     TABSTOP = 8
---
>     TABSTOPL = 28
>     TABSTOPR = 8
93,94c95,96
<             l1 = (l1 // self.TABSTOP + 1) * self.TABSTOP
<             l2 = (l2 // self.TABSTOP + 1) * self.TABSTOP
---
>             l1 = (l1 // self.TABSTOPL + 1) * self.TABSTOPL
>             l2 = (l2 // self.TABSTOPR + 1) * self.TABSTOPR