A family of Microsoft word processing software products for creating web, email, and print documents.
That's as simple as editing your mergefields, which you can do by selecting them and pressing Shift-F9.
Starting with:
Thank you for your recent gift«tribute_type»«tribute_name».
select both mergefields and press Shift-F9. You should now see:
Thank you for your recent gift{MERGEFIELD tribute_type \b " "}{MERGEFIELD tribute_name \b " "}.
Edit the field code so you end up with:
Thank you for your recent gift{MERGEFIELD tribute_type \b " "}{MERGEFIELD tribute_name \b " "}.
Re-select the fields and press F9 when you're done. You can now run your merge.