acquire on the shared empty string does nothing
acquire on the shared empty string does nothing

Change-Id: I03a38c387044bda8cec6287ab41c6d202c496473

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