This program creates a string for the history array when multiple datatypes, spacecraft or stations are chosen, for use in the themis_w_event routine $LastChangedBy: cgoethel $ $LastChangedDate: 2008-07-08 08:41:22 -0700 (Tue, 08 Jul 2008) $ $LastChangedRevision: 3261 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/projects/themis/deprecated/thm_ui/thm_ui_multichoice_history.pro $