This is simply convert any tab to space in a file in a fast manner.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1885    4300  43.8% -lh5- cf18 Sep  2  1992 Tab2Space
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         1 file     1885    4300  43.8%            Jun 28  1995