OUString: avoid concatenated appends and temporaries
OUString: avoid concatenated appends and temporaries

Change-Id: If18b40b15ce83aa794527b9b9109b916dc6c3ed8

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