make this simpler
make this simpler

replace EraseLeadingChars+EraseTrailingChars with single
EraseLeadingAndTrailingChars, and those change string they
operate on, so need for assign to self afterwards

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