Variable: find-file-wildcards
find-file-wildcards is a customizable variable defined in files.el.gz.
Value
t
Documentation
Non-nil means file-visiting commands should handle wildcards.
For example, if you specify *.c, that would visit all the files
whose names match the pattern.
This variable was added, or its default value changed, in Emacs 20.4.
Source Code
;; Defined in /usr/src/emacs/lisp/files.el.gz
(defcustom find-file-wildcards t
"Non-nil means file-visiting commands should handle wildcards.
For example, if you specify `*.c', that would visit all the files
whose names match the pattern."
:group 'files
:version "20.4"
:type 'boolean)