= s/TS command
        .split the line into the 2 lines at the cursor position
         on any line. null line is inserted for shorter line than cursor pos.
         assume cursor is on column 3 in the following examples.
        .n is not supported for xx-xx pattern

      (1) x[n][,b][.s] pattern

        .split following 4 lines

            s4     |AAAAAAAAAAAAAAAAA
            0002000|12
            0003000|CCCCCCCCCCCCCCCCC
            0004000|DDDDDDDDDDDDDDDDD
            0005000|EEEEEEEEEEEEEEEEE
        ===>
       r1   0001000*AA
            0001100*AAAAAAAAAAAAAAA
       r2   0002000|12
            0002100*
       r3   0003000*CC
            0003100*CCCCCCCCCCCCCCC
       r4   0004000*DD
            0004100*DDDDDDDDDDDDDDD
            0005000|EEEEEEEEEEEEEEEEE

        .repeat 3 times to split 2 lines and to skip 1 line.

            s3,2.1 |AAAAAAAAAAAAAAAAA
            0002000|12
            0003000|CCCCCCCCCCCCCCCCC
            0004000|DDDDDDDDDDDDDDDDD
            0005000|EEEEEEEEEEEEEEEEE
            0006000|FFFFFFFFFFFFFFFFF
            0007000|GGGGGGGGGGGGGGGGG
            0008000|HHHHHHHHHHHHHHHHH
            0009000|IIIIIIIIIIIIIIIII
            0010000|JJJJJJJJJJJJJJJJJ
        ===>
      r1 b1 0001000*AA
            0001100*AAAAAAAAAAAAAAA
         b2 0002000|12
            0002100*
         s1 0003000|CCCCCCCCCCCCCCCCC
      r2 b1 0004000*DD
            0004100*DDDDDDDDDDDDDDD
         b2 0005000*EE
            0005100*EEEEEEEEEEEEEEE
         s1 0006000|FFFFFFFFFFFFFFFFF
      r3 b1 0007000*GG
            0007100*GGGGGGGGGGGGGGG
         b2 0008000*HH
            0008100*HHHHHHHHHHHHHHH
            0009000|IIIIIIIIIIIIIIIII
            0010000|JJJJJJJJJJJJJJJJJ

      (2) xx-xx[,b][.s] pattern

        .split all the line of the range.

            ss     |AAAAAAAAAAAAAAAAA
            0002000|12
            0003000|CCCCCCCCCCCCCCCCC
            0004000|DDDDDDDDDDDDDDDDD
            0005000|EEEEEEEEEEEEEEEEE
            ss     |FFFFFFFFFFFFFFFFF
            0007000|GGGGGGGGGGGGGGGGG
        ===>
            0001000*AA
            0001100*AAAAAAAAAAAAAAA
            0002000|12
            0002100*
            0003000*CC
            0003100*CCCCCCCCCCCCCCC
            0004000*DD
            0004100*DDDDDDDDDDDDDDD
            0005000*EE
            0005100*EEEEEEEEEEEEEEE
            0006000*FF
            0006100*FFFFFFFFFFFFFFF
            0007000|GGGGGGGGGGGGGGGGG

        .repeat in the range to split 3 lines and to skip 2 lines.

            ss,3   |AAAAAAAAAAAAAAAAA
            0002000|12
            0003000|CCCCCCCCCCCCCCCCC
            0004000|DDDDDDDDDDDDDDDDD
            0005000|EEEEEEEEEEEEEEEEE
            0006000|FFFFFFFFFFFFFFFFF
            0007000|GGGGGGGGGGGGGGGGG
            0008000|HHHHHHHHHHHHHHHHH
            0009000|IIIIIIIIIIIIIIIII
            0010000|JJJJJJJJJJJJJJJJJ
            0011000|KKKKKKKKKKKKKKKKK
            0012000|LLLLLLLLLLLLLLLLL
            0013000|MMMMMMMMMMMMMMMMM
            0014000|NNNNNNNNNNNNNNNNN
            0015000|OOOOOOOOOOOOOOOOO
            0016000|PPPPPPPPPPPPPPPPP
            ss.2   |QQQQQQQQQQQQQQQQQ
            0018000|RRRRRRRRRRRRRRRRR
        ===>
      rr b1 0001000*AA
            0001100*AAAAAAAAAAAAAAA
         b2 0002000|12
            0002100*
         b3 0003000*CC
            0003100*CCCCCCCCCCCCCCC
         s1 0004000|DDDDDDDDDDDDDDDDD
         s2 0005000|EEEEEEEEEEEEEEEEE
      rr b1 0006000*FF
            0006100*FFFFFFFFFFFFFFF
         b2 0007000*GG
            0007100*GGGGGGGGGGGGGGG
         b3 0008000*HH
            0008100*HHHHHHHHHHHHHHH
         s1 0009000|IIIIIIIIIIIIIIIII
         s2 0010000|JJJJJJJJJJJJJJJJJ
      rr b1 0011000*KK
            0011100*KKKKKKKKKKKKKKK
         b2 0012000*LL
            0012100*LLLLLLLLLLLLLLL
         b3 0013000*MM
            0013100*MMMMMMMMMMMMMMM
         s1 0014000|NNNNNNNNNNNNNNNNN
         s2 0015000|OOOOOOOOOOOOOOOOO
      rr b1 0016000*PP
            0016100*PPPPPPPPPPPPPPP
         b2 0017000*QQ
            0017100*QQQQQQQQQQQQQQQ
            0018000|RRRRRRRRRRRRRRRRR