tabs converted to spaces?

[Bryan Dawson ext 1184]

In article <4425 at ptsfa.PacBell.COM>, dmt at ptsfa.PacBell.COM (Dave Turner) writes:
> In article <3940001 at hpgrla.HP.COM> douglasg at hpgrla.HP.COM (@Douglas Genetten) writes:
> >Is there a filter which converts tabs to n-spaces throughout
> >a file?
> 
> You might try newform and/or sed.

Several replies have mentioned tr or sed. I assume that the desired
result is to convert tabs to spaces *in a fomat preserving manner*.
The correct standard tool to do this in UNIX is expand. Expand is
designed to perform exactly this function (and its inverse 'unexpand')
and does so very well.