ls no longer segfaults on systems for which SIZE_MAX != (size_t) -1
+ echo now conforms to POSIX better. It supports the \0ooo syntax for
+ octal escapes, and \c now terminates printing immediately. If
+ POSIXLY_CORRECT is set and the first argument is not "-n", echo now
+ outputs all option-like arguments instead of treating them as options.
+
** New features
For efficiency, `sort -m' no longer copies input to a temporary file
`date' has a new option --iso-8601=ns that outputs
nanosecond-resolution time stamps.
+ echo -e '\xHH' now outputs a byte whose hexadecimal value is HH,
+ for compatibility with bash.
+
* Major changes in release 5.2.1 (2004-03-12) [stable]