I thought this would make Emacs complete as you want.  But: what files
should be shown when hitting TAB?  I decided to show only matching
files, plus all directories (seems logical, since these may contain
matching files).

But that gives a bad user experience: When I tried this I thought it
would not work because completion did not accept an existing empty
directory.  Then I saw that it actually was not empty.  But it contained only
plain files, no subdirectories, and TAB displayed nothing.  Quite confusing!


> How about the attached patch?

| diff --git a/lisp/files.el b/lisp/files.el
| index b72f141c0ee..1fe124848b9 100644
| --- a/lisp/files.el
| +++ b/lisp/files.el
| @@ -817,7 +817,7 @@ non-empty string that was inserted by this function.
|  If the user exits with an empty minibuffer, this function returns
|  an empty string.  (This can happen only if the user erased the
|  pre-inserted contents or if `insert-default-directory' is nil.)
| -Fourth arg MUSTMATCH non-nil means require existing directory's name.
| +Fourth arg MUSTMATCH is passed as-is to `read-file-name', which see.

Ok from my side.

What do others think about all of this?


Thx,

Michael.