This function must return non-nil for a wildcard like '/*/*.txt'.
* lisp/files.el (insert-directory-wildcard-in-dir-p): Adjust regexp.
* test/lisp/files-tests.el (files-tests--insert-directory-wildcard-in-dir-p):
Add test.
Fixes Bug#25951.
* lisp/files.el (file-name-non-special): Set the file name for the
correct buffer.
* test/lisp/files-tests.el (files-tests--file-name-non-special--buffers):
Add unit test.
(files-tests--with-advice, files-tests--with-temp-file): New helper
macros.
`call-process' doesn't respect file name handlers in
`default-directory', so `file-name-non-special' has to resolve them
for `process-file', `start-file-process', and
`shell-command' (Bug#25949).
* lisp/files.el (file-name-non-special): Also resolve default
directory for 'process-file', 'start-file-process', and
'shell-command'.
* test/lisp/files-tests.el
(files-tests--file-name-non-special--subprocess): Add unit test.
When in a directory named '~', the default value given by
`read-file-name' should be quoted by prepending '/:', in order to
prevent it from being interpreted as referring to the $HOME
directory (Bug#16984).
* lisp/minibuffer.el (minibuffer-maybe-quote-filename): New function.
(completion--sifn-requote, read-file-name-default): Use it instead of
`minibuffer--double-dollars'.
* test/lisp/files-tests.el (files-test-read-file-in-~): Test it.
Introduce a new customization option, `confirm-kill-processes', that
users can set to nil if they don't want Emacs to nag them about killing
processes.
* lisp/files.el (confirm-kill-processes): New customization option.
(save-buffers-kill-emacs): Use customization option.
* test/lisp/files-tests.el
(files-test--save-buffers-kill-emacs--confirm-kill-processes): Add
test for new customization option.
* doc/emacs/entering.texi (Exiting): Document new user option.
* doc/lispref/processes.texi (Query Before Exit): Document new
user option.
* etc/NEWS: Document new user option.
