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Major changes in release 1.9:
* su fails gracefully when getpass is unable to open /dev/tty.
* printenv and tty detect and report write errors
* fix bug in stty
* stty supports accepts the new options status and flush on systems that
provide them
* fix bugs in expr
* better support for Linux, Dec Alpha, and SGI Irix
* all programs (even true and false) accept --version and --help options
* uname's --version option is no longer equivalent to its -v option
* configure uses config.h, so DEFS won't exceed preprocessor limits of
some compilers on the number of symbols defined via -D.
* work around problem where $(srcdir)/config.h was used instead of
../config.h -- this happened only when building in a subdirectory
and when config.h remained in $(srcdir) from a previous ./configure.
* make may be run from the subdirectories
Major changes in release 1.8:
* add echo command
* fix some incorrect warnings in pathchk
* look at the right utmp file on 386BSD
* date doesn't dump core on some systems now
Major changes in release 1.7:
* add su, who, true, false commands
* add more tests to expr
* fix printf program handling of \ escapes
* printf can re-use format string for multiple groups of arguments
* printf catches numeric conversion errors with an ANSI C library
* stty nl and -nl were backwards
* date can format an arbitrary date without setting it
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