получить строку от пользователя с редактированием (get a line from a user with editing)
SEARCHING
Readline provides commands for searching through the command
history for lines containing a specified string. There are two
search modes: incremental and non-incremental.
Incremental searches begin before the user has finished typing
the search string. As each character of the search string is
typed, readline displays the next entry from the history matching
the string typed so far. An incremental search requires only as
many characters as needed to find the desired history entry. To
search backward in the history for a particular string, type C-r.
Typing C-s searches forward through the history. The characters
present in the value of the isearch-terminators variable are used
to terminate an incremental search. If that variable has not
been assigned a value the Escape and C-J characters will
terminate an incremental search. C-G will abort an incremental
search and restore the original line. When the search is
terminated, the history entry containing the search string
becomes the current line.
To find other matching entries in the history list, type C-s or
C-r as appropriate. This will search backward or forward in the
history for the next line matching the search string typed so
far. Any other key sequence bound to a readline command will
terminate the search and execute that command. For instance, a
newline will terminate the search and accept the line, thereby
executing the command from the history list. A movement command
will terminate the search, make the last line found the current
line, and begin editing.
Non-incremental searches read the entire search string before
starting to search for matching history lines. The search string
may be typed by the user or be part of the contents of the
current line.
