master e70d82d855 3/3: Merge from origin/emacs-28

[Stefan Kangas]

branch: master
commit e70d82d85529104deae45e5bdfe635d5dd9cd200
Merge: 7d9d5ecf86 22a832ad82
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Merge from origin/emacs-28
    
    22a832ad82 Mention the #f syntax from cl-prin1
---
 doc/lispref/objects.texi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/lispref/objects.texi b/doc/lispref/objects.texi
index 07caaa2a07..1bae192455 100644
--- a/doc/lispref/objects.texi
+++ b/doc/lispref/objects.texi
@@ -178,6 +178,12 @@ files.
 Skip the next @samp{N} characters (@pxref{Comments}).  This is used in
 byte-compiled files, and is not meant to be used in Emacs Lisp source
 files.
+
+@item #f
+Indicates that the following form isn't readable by the Emacs Lisp
+reader.  This is only in text for display purposes (when that would
+look prettier than alternative ways of indicating an unreadable form)
+and will never appear in any Lisp file.
 @end table