find-file-wildcards

find-file-wildcards is a variable defined in `files.el'.
Its value is

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.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 20.4 of Emacs.