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    implemented, controlled by a new `shopt' option, `extglob'.  
    
e.  There is a new ksh-like `[[' compound command, which implements   
    extended `test' functionality.
    
f.  There is a new `printf' builtin, implemented according to the POSIX.2
    specification.
    
g.  There is a new feature for command substitution: $(< filename) now expands
    to the contents of `filename', with any trailing newlines removed
    (equivalent to $(cat filename)).

h.  There are new tilde prefixes which expand to directories from the
    directory stack.

i.  There is a new `**' arithmetic operator to do exponentiation.

j.  There are new configuration options to control how bash is linked:
    `--enable-profiling', to allow bash to be profiled with gprof, and
    `--enable-static-link', to allow bash to be linked statically.

k.  There is a new configuration option, `--enable-cond-command', which
    controls whether or not the `[[' command is included.  It is on by
    default. 

l.  There is a new configuration option, `--enable-extended-glob', which
    controls whether or not the ksh extended globbing feature is included.
    It is enabled by default.

m.  There is a new configuration #define in config.h.top that, when enabled,
    will cause all login shells to source /etc/profile and one of the user-
    specific login shell startup files, whether or not the shell is
    interactive.  
    
n.  There is a new invocation option, `--dump-po-strings', to dump
    a shell script's translatable strings ($"...") in GNU `po' format. 
    
o.  There is a new `shopt' option, `nocaseglob', to enable case-insensitive
    pattern matching when globbing filenames and using the `case' construct.

p.  There is a new `shopt' option, `huponexit', which, when enabled, causes
    the shell to send SIGHUP to all jobs when an interactive login shell
    exits.

q.  `bind' has a new `-u' option, which takes a readline function name as an
    argument and unbinds all key sequences bound to that function in a
    specified keymap.
    
r.  `disown' now has `-a' and `-r' options, to limit operation to all jobs
    and running jobs, respectively.

s.  The `shopt' `-p' option now causes output to be displayed in a reusable
    format.
    
t.  `test' has a new `-N' option, which returns true if the filename argument
    has been modified since it was last accessed.

u.  `umask' now has a `-p' option to print output in a reusable format.
    
v.  A new escape sequence, `\xNNN', has been added to the `echo -e' and $'...'
    translation code.  It expands to the character whose ascii code is NNN
    in hexadecimal.
    
w.  The prompt string expansion code has a new `\r' escape sequence.

x.  The shell may now be cross-compiled for the CYGWIN32 environment on
    a Unix machine.

2. New Features in Readline

a.  There is now an option for `iterative' yank-last-arg handline, so a user
    can keep entering `M-.', yanking the last argument of successive history
    lines.

b.  New variable, `print-completions-horizontally', which causes completion
    matches to be displayed across the screen (like `ls -x') rather than up
    and down the screen (like `ls').

c.  New variable, `completion-ignore-case', which causes filename completion
    and matching to be performed case-insensitively.

d.  There is a new bindable command, `magic-space', which causes history
    expansion to be performed on the current readline buffer and a space to
    be inserted into the result.

e.  There is a new bindable command, `menu-complete', which enables tcsh-like
    menu completion (successive executions of menu-complete insert a single
    completion match, cycling through the list of possible completions).

f.  There is a new bindable command, `paste-from-clipboard', for use on Win32
    systems, to insert the text from the Win32 clipboard into the editing
    buffer.

g.  The key sequence translation code now understands printf-style backslash
    escape sequences, including \NNN octal escapes.  These escape sequences
    may be used in key sequence definitions or macro values.

h.  An `$include' inputrc file parser directive has been added.

-------------------------------------------------------------------------------
This is a terse description of the new features added to bash-2.01 since
the release of bash-2.0.  As always, the manual page (doc/bash.1) is the
place to look for complete descriptions.

1. New Features in Bash

a.  There is a new builtin array variable: GROUPS, the set of groups to which
    the user belongs.  This is used by the test suite.

2.  New Features in Readline

a.  If a key sequence bound to `universal-argument' is read while reading a
    numeric argument started with `universal-argument', it terminates the
    argument but is otherwise ignored.  This provides a way to insert multiple
    instances of a digit string, and is how GNU emacs does it.

-------------------------------------------------------------------------------
This is a terse description of the new features added to bash-2.0 since
the release of bash-1.14.7.  As always, the manual page (doc/bash.1) is
the place to look for complete descriptions.

1.  New Features in Bash

a.  There is a new invocation option, -D, that dumps translatable strings
    in a script.

b.  The `long' invocation options must now be prefixed with `--'.

c.  New long invocation options:  --dump-strings, --help, --verbose

d.  The `nolineediting' invocation option was renamed to `noediting'.

e.  The `nobraceexpansion' and `quiet' long invocation options were removed.

f.  The `--help' and `--version' long options now work as the GNU coding
    standards specify.

g.  If invoked as `sh', bash now enters posix mode after reading the
    startup files, and reads and executes commands from the file named
    by $ENV if interactive (as POSIX.2 specifies).  A login shell invoked
    as `sh' reads $ENV after /etc/profile and ~/.profile.

h.  There is a new reserved word, `time', for timing pipelines, builtin
    commands, and shell functions.  It uses the value of the TIMEFORMAT
    variable as a format string describing how to print the timing
    statistics.

i.  The $'...' quoting syntax expands ANSI-C escapes in ... and leaves the
    result single-quoted.

j.  The $"..." quoting syntax performs locale-specific translation of ...
    and leaves the result double-quoted.

k.  LINENO now works correctly in functions.

l.  New variables: DIRSTACK, PIPESTATUS, BASH_VERSINFO, HOSTNAME, SHELLOPTS,
    MACHTYPE.  The first three are array variables.

m.  The BASH_VERSION and BASH_VERSINFO variables now include the shell's
    `release status' (alpha[N], beta[N], release).

n.  Some variables have been removed:  MAIL_WARNING, notify, history_control,
    command_oriented_history, glob_dot_filenames, allow_null_glob_expansion,
    nolinks, hostname_completion_file, noclobber, no_exit_on_failed_exec, and
    cdable_vars.  Most of them are now implemented with the new `shopt'
    builtin; others were already implemented by `set'.

o.  Bash now uses some new variables:  LC_ALL, LC_MESSAGES, LC_CTYPE,
    LC_COLLATE, LANG, GLOBIGNORE, HISTIGNORE.

p.  The shell now supports integer-indexed arrays of unlimited length,
    with a new compound assignment syntax and changes to the appropriate
    builtin commands (declare/typeset, read, readonly, etc.).  The array
    index may be an arithmetic expression.

q.  ${!var}: indirect variable expansion, equivalent to eval \${$var}.

r.  ${paramter:offset[:length]}: variable substring extraction.

s.  ${parameter/pattern[/[/]string]}: variable pattern substitution.

t.  The $[...] arithmetic expansion syntax is no longer supported, in
    favor of $((...)).

u.  Aliases can now be expanded in shell scripts with a shell option
    (shopt expand_aliases).

v.  History and history expansion can now be used in scripts with
    set -o history and set -H.

w.  All builtins now return an exit status of 2 for incorrect usage.

x.  Interactive shells resend SIGHUP to all running or stopped children
    if (and only if) they exit due to a SIGHUP.

y.  New prompting expansions: \a, \e, \H, \T, \@, \v, \V.

z.  Variable expansion in prompt strings is now controllable via a shell
    option (shopt promptvars).

aa. Bash now defaults to using command-oriented history.

bb. The history file ($HISTFILE) is now truncated to $HISTFILESIZE after
    being written.

cc. The POSIX.2 conditional arithmetic evaluation syntax (expr ? expr : expr)
    has been implemented.

dd. Each builtin now accepts `--' to signify the end of the options, except
    as documented (echo, etc.).

ee. All builtins use -p to display values in a re-readable format where
    appropriate, except as documented (echo, type, etc.).

ff. The `alias' builtin has a new -p option.

gg. Changes to the `bind' builtin:
	o has new options: -psPSVr.
	o the `-d' option was renamed to `-p'
	o the `-v' option now dumps variables; the old `-v' is now `-P'

hh. The `bye' synonym for `exit' was removed.

ii. The -L and -P options to `cd' and `pwd' have been documented.

jj. The `cd' builtin now does spelling correction on the directory name
    by default.  This is settable with a shell option (shopt cdspell).

kk. The `declare' builtin has new options: -a, -F, -p.

ll. The `dirs' builtin has new options: -c, -p, -v.

mm. The new `disown' builtin removes jobs from the shell's jobs table
    or inhibits the resending of SIGHUP when the shell receives a
    SIGHUP.

nn. The `echo' builtin has a new escape character: \e.

oo. The `enable' builtin can now load new builtins dynamically from shared
    objects on systems with the dlopen/dlsym interface.  There are a number
    of examples in the examples/loadables directory.  There are also
    new options: -d, -f, -s, -p.

pp. The `-all' option to `enable' was removed in favor of `-a'.

qq. The `exec' builtin has new options: -l, -c, -a.

rr. The `hash' builtin has a new option: -p.

ss. The `history' builtin has new options: -c, -p, -s.

tt. The `jobs' builtin has new options: -r, -s.

uu. The `kill' builtin has new options: -n signum, -l signame.

vv. The `pushd' and `popd' builtins have a new option: -n.

ww. The `read' builtin has new options: -p prompt, -e, -a.

xx. The `readonly' builtin has a new -a option, and the -n option was removed.

yy. Changes to the `set' builtin:
	o new options: -B, -o keyword, -o onecmd, -o history
	o options removed: -l, -d, -o nohash
	o options changed: +o, -h, -o hashall
	o now displays variables in a format that can be re-read as input

zz. The new `shopt' builtin controls shell optional behavior previously
    done by setting and unsetting certain shell variables.

aaa. The `test' builtin has new operators: -o option, s1 == s2, s1 < s2,
     and s1 > s2, where s1 and s2 are strings.

bbb. There is a new trap, DEBUG, executed after every simple command.

ccc. The `trap' builtin has a new -p option.

ddd. The `ulimit' builtin has a new -l option on 4.4BSD-based systems.

eee. The PS1, PS2, PATH, and IFS variables may now be unset.

fff. The restricted shell mode has been expanded and is now documented.

ggg. Security improvements:
	o functions are not imported from the environment if running setuid
	  or with -p
	o no startup files are sourced if running setuid or with -p

hhh. The documentation has been overhauled:  the texinfo manual was
     expanded, and HTML versions of the man page and texinfo manual
     are included.

iii. Changes to Posix mode:
	o Command lookup now finds special builtins before shell functions.
	o Failure of a special builtin causes a non-interactive shell to
	  exit.  Failures are defined in the POSIX.2 specification.
	o If the `cd' builtin finds a directory to change to using $CDPATH,
	  the value assigned to PWD when `cd' completes does not contain
	  any symbolic links.
	o A non-interactive shell exits if a variable assignment error
	  occurs when no command name follows the assignment statements.
	o A non-interactive shell exits if the interation variable in a
	  `for' statement or the selection variable in a `select' statement
	  is read-only or another variable assignment error occurs.