There is no option for doing that.
You could achieve it by running the following macro on a document containing
revisions (after the revision have been made)
Dim arev As Revision
For Each arev In ActiveDocument.Revisions
If arev.Type = wdRevisionDelete Then
arev.Range.InsertBefore "["
arev.Range.InsertAfter "]"
End If
Next arev
Options.DeletedTextMark = wdDeletedTextMarkNone
If you do that, to get deleted text to be struck through, next time you use
track revisions, you would need to run a macro containing
Options.DeletedTextMark = wdDeletedTextMarkStrikeThrough
--
Please post any further questions or followup to the newsgroups for the
benefit of others who may be interested. Unsolicited questions forwarded
directly to me will only be answered on a paid consulting basis.
Hope this helps
Doug Robbins - Word MVP