Ulfex ignores comments during extraction too
Ulfex ignores comments during extraction too

During string extraction this does not cause
real problem but causes unnecessary operations.
Plus make isNextGroup not to change sLine_in
parameter.

Change-Id: I3db6a94ef320c096a7519f7f83dd4080d0588459

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