In previous versions of Stock Synthesis,
the file new data file was named data.ss_new.
_echo was added to the name when the file was parsed into three separate
files.
get_dat_new_name(dir)Relative or absolute path to a directory
A string with the name of the data .ss_new file. If not found, will
be NA. Both of strings are searched for using dir(pattern = ) and
if both exist, then data_echo.ss_new is returned.