If set to positive value, TRichView components will replace TAB characters with the specified number of space characters.
property SpacesInTab: SmallInt;
TRichView must be linked with this TRVStyle (see TRichView.Style).
If this property is 0, TABs are inserted as a special tabulator item type.
Note: default value is changed to 0 since v1.9
See also properties: