* doc/misc/auth.texi: Replace @code{"..."} by @t{"..."}.
(Help for users): Describe property lists format. Explain, that
empty files in auth-sources are ignored when
auth-source-ignore-empty-file is non-nil.
(Help for developers): Add auth-source-creation-defaults to vindex.
* etc/NEWS: Introduce auth-source-ignore-empty-file.
Presentational fixes and improvements.
* lisp/auth-source.el (auth-source-ignore-empty-file): New defcustom.
(auth-source-backends-parser-file): Use it. (Bug#9113)
* test/lisp/auth-source-tests.el (auth-source-validate-backend):
Let-bind `auth-source-ignore-empty-file'.
(auth-source-test-searches): Set file suffix.
(auth-source-test-netrc-create-secret): Adapt test.