Fix for behavior of bin -f nonexistent (was flipped)

bin

@@ -292,7 +292,7 @@ case "$action" in
         for f; do
             filename="$(readlink -f -- "$f")"
             if ! [ -e "$filename" ]; then
-              [ "$force_flag" != "-f" ] || fail "File does not exist: $filename"
+              [ "$force_flag" = "-f" ] || fail "File does not exist: $filename"
             else
               can_trash "$filename" && trash_file "$filename" || exit 1
             fi