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This is a terse description of the new features added to readline-5.1 since

the release of readline-5.0.

1.  New Features in Readline

a.  The key sequence sent by the keypad `delete' key is now automatically

    bound to delete-char.

b.  A negative argument to menu-complete now cycles backward through the

    completion list.

c.  A new bindable readline variable:  bind-tty-special-chars.  If non-zero,

    readline will bind the terminal special characters to their readline

    equivalents when it's called (on by default).

d.  New bindable command: vi-rubout.  Saves deleted text for possible

    reinsertion, as with any vi-mode `text modification' command; `X' is bound

    to this in vi command mode.

e.  If the rl_completion_query_items is set to a value < 0, readline never

    asks the user whether or not to view the possible completions.

f.  New application-callable auxiliary function, rl_variable_value, returns

    a string corresponding to a readline variable's value.

g.  When parsing inputrc files and variable binding commands, the parser

    strips trailing whitespace from values assigned to boolean variables

    before checking them.

h.  A new external application-controllable variable that allows the LINES

    and COLUMNS environment variables to set the window size regardless of

    what the kernel returns.