Fix the warning given for invalid attribute names
Fix the warning given for invalid attribute names

It should contain only letters and no digits

liblouis/liblouis,liblouis/liblouis,BueVest/liblouis,hammera/liblouis,hammera/liblouis,BueVest/liblouis,hammera/liblouis,hammera/liblouis,hammera/liblouis,BueVest/liblouis,liblouis/liblouis,BueVest/liblouis,BueVest/liblouis,hammera/liblouis,liblouis/liblouis,BueVest/liblouis,liblouis/liblouis,liblouis/liblouis