a       b       c       d       e       f       g       h       i       j      k
a                                       f               h       i   <
a

default tab stops:
near end:                                                               !bcdefg
at end:                                                                 abcdefgh
!
at end (2):                                                             abcdefgh
!
at end with clipping:                                                   !bcdefgh
at end with clipping (2):                                       !       abcdefgh

set tab stop at column 80:                                                     v
at end:                                                                 abcdefgh
!
at end (2):                                                             abcdefgh
!
at end with clipping:                                                   !bcdefgh
at end with clipping (2):                                       !       abcdefgh