writerfilter: make it easy to debug the old RTF filter
writerfilter: make it easy to debug the old RTF filter

Change-Id: Ifc1d6b78f55e7f202f5cc391f1401de5b65ed395

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core