Removed the now redundant string_tools append routines, and added some checks to split.
Removed the now redundant string_tools append routines, and added some checks to split.

SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack