new_builder now correctly handles empty (not missing, but empty) file
new_builder now correctly handles empty (not missing, but empty) file
Caoimhinmg/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy,Caoimhinmg/PmagPy,lfairchild/PmagPy