4.14.11 Command editing (‘set editing’, ‘show editing’)

the BASH debugger reads its input commands through bash which uses via the readline interface. This GNU library provides consistent behavior for programs which provide a command line interface to the user. Advantages are GNU Emacs-style or vi-style inline editing of commands, csh-like history substitution, and a storage and recall of command history across debugging sessions.

You may control the behavior of command line editing in BASH with the command set.

set editing
set editing [ on | 1 ]

Enable command line editing (enabled by default).

set editing [ off | 0 ]

Disable command line editing.

show editing

Show whether command line editing is enabled.