= o command
.only overwrite method is different with "p" command.
p cmd:paste all chars of the source line.
o cmd:only space chars of destination line are overwritten
by char of corresponding position of source line.
n cmd:only non-space char of source line are selected
and overwrite corresponding position of destination line.
c | : : :
oo |02/11/05
0003000|01 23 51 123
0004000|01 23 55 228
0005000|01 24 12 560
0006000|02 13 01 125
0007000|02/11/06
0008000|01 14 12 160
oo |02 16 01 225
===>
0001000| : : :
0002000*02/11/05:
0003000*01:23:51:123
0004000*01:23:55:228
0005000*01:24:12:560
0006000*02:13:01:125
0007000*02/11/06:
0008000*01:14:12:160
0009000*02:16:01:225
0007000*03:03:34.970