######### FINALLY FIGURED OUT WHAT _ IS!!!
# QUOTE:
#
# If any of the file tests (or either the stat() or lstat()  operators) are given
# the special filehandle consisting of a solitary underline, then the stat structure
# of the previous file test (or stat operator) is used, saving a system call.
#
# Isn't that something?  All I gotta do now figure out what or where is the previous
# test??