GitLab

* lisp/simple.el (filter-buffer-substring-functions)
(filter-buffer-substring-function, buffer-substring-filters)
(filter-buffer-substring, buffer-substring--filter): Doc fixes.

* doc/lispref/text.texi (Buffer Contents):
Update for filter-buffer-substring changes.

* doc/lispref/hooks.texi: Remove old comment.

* etc/NEWS: Related markup.