emacs-29 f2b2c752a59: Fix documentation of saveplace facilities for Dired

[Eli Zaretskii]

branch: emacs-29
commit f2b2c752a5920c1152fd70d917e0fc5a3c9728c4
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix documentation of saveplace facilities for Dired
    
    * lisp/saveplace.el (save-place-dired-hook, save-place-alist):
    * lisp/dired.el (dired-initial-position-hook)
    (dired-initial-position): Doc fixes.  (Bug#65055)
---
 lisp/dired.el     |  8 ++++----
 lisp/saveplace.el | 14 +++++++++++++-
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/lisp/dired.el b/lisp/dired.el
index d14cf47ffd5..d0af05d68f0 100644
--- a/lisp/dired.el
+++ b/lisp/dired.el
@@ -346,7 +346,7 @@ with the buffer narrowed to the listing."
   :type 'boolean)
 
 (defcustom dired-initial-position-hook nil
-  "This hook is used to position the point.
+  "Hook used to position point in a new Dired listing display.
 It is run by the function `dired-initial-position'."
   :group 'dired
   :type 'hook
@@ -3541,9 +3541,9 @@ as returned by `dired-get-filename'.  LIMIT is the search 
limit."
 
 ;; FIXME document whatever dired-x is doing.
 (defun dired-initial-position (dirname)
-  "Where point should go in a new listing of DIRNAME.
-Point is assumed to be at the beginning of new subdir line.
-It runs the hook `dired-initial-position-hook'."
+  "Return position of point in a new listing of DIRNAME.
+Point is assumed to be at the beginning of a new subdir line.
+Runs the hook `dired-initial-position-hook'."
   (end-of-line)
   (and (featurep 'dired-x) dired-find-subdir
        (dired-goto-subdir dirname))
diff --git a/lisp/saveplace.el b/lisp/saveplace.el
index 7512fc87c5d..71cd8b9bc0e 100644
--- a/lisp/saveplace.el
+++ b/lisp/saveplace.el
@@ -47,6 +47,17 @@
 Each element looks like (FILENAME . POSITION);
 visiting file FILENAME goes automatically to position POSITION
 rather than the beginning of the buffer.
+A list element can also have the form
+
+   (DIRECTORY (dired-filename . FILENAME))
+
+where DIRECTORY is the name of a directory ending in a slash,
+and FILENAME is the name of a file in that directory.  This
+format is used for saving places in Dired buffers, see the
+function `save-place-dired-hook'; the FILENAME is the file
+where point was located in the Dired listing of DIRECTORY
+when the place in that buffer was recorded.
+
 This alist is saved between Emacs sessions.")
 
 (defcustom save-place-file (locate-user-emacs-file "places" ".emacs-places")
@@ -366,7 +377,8 @@ It runs the hook `save-place-after-find-file-hook'."
 (declare-function dired-goto-file "dired" (file))
 
 (defun save-place-dired-hook ()
-  "Position the point in a Dired buffer."
+  "Position point in a Dired buffer according to its saved place.
+This is run via `dired-initial-position-hook', which see."
   (or save-place-loaded (save-place-load-alist-from-file))
   (let* ((directory (and (derived-mode-p 'dired-mode)
                          (boundp 'dired-subdir-alist)