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

Change-Id: I55843e876f1a01c7800cd638fc0ec0bae4933994

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