Variable: ido-create-new-buffer
ido-create-new-buffer is a customizable variable defined in ido.el.gz.
Value
prompt
Documentation
Specify whether a new buffer is created if no buffer matches substring.
Choices are always to create new buffers unconditionally, prompt to
ask user whether to create buffer, or never to never create new buffer.
Source Code
;; Defined in /usr/src/emacs/lisp/ido.el.gz
(defcustom ido-create-new-buffer 'prompt
"Specify whether a new buffer is created if no buffer matches substring.
Choices are `always' to create new buffers unconditionally, `prompt' to
ask user whether to create buffer, or `never' to never create new buffer."
:type '(choice (const always)
(const prompt)
(const never)))