Merge from origin/emacs-29

4df510c7a7 Fix VC package build when doc file isn't in a subdir
382f5fa813 ; * doc/emacs/package.texi (Fetching Package Sources): Fi...
fc7e7c3fde Fix type check in tramp-get-buffer-string
2aa57fe6cf ; Fix typo in maintaining.texi (bug#64279)

doc/emacs/maintaining.texi

@@ -716,7 +716,7 @@ started editing (@pxref{Old Revisions}), type @kbd{C-c C-d}
 (@code{log-edit-generate-changelog-from-diff}), to generate skeleton
 ChangeLog entries, listing all changed file and function names based
 on the diff of the VC fileset.  Consecutive entries left empty will be
-combined by @kbd{C-q} (@code{fill-paragraph}).  By default the
+combined by @kbd{M-q} (@code{fill-paragraph}).  By default the
 skeleton will just include the file name, without any leading
 directories.  If you wish to prepend the leading directories up to the
 VC root, customize @code{diff-add-log-use-relative-names}.

doc/emacs/package.texi

@@ -625,7 +625,7 @@ checkout instead of cloning a remote repository.  You can do this by
 using @code{package-vc-install-from-checkout}, which creates a symbolic link
 from the package directory (@pxref{Package Files}) to your checkout
 and initializes the code.  Note that you might have to use
-@code{package-vc-refresh} to repeat the initialization and update the
+@code{package-vc-rebuild} to repeat the initialization and update the
 autoloads.
 
 @subsection Specifying Package Sources

lisp/emacs-lisp/package-vc.el

@@ -386,7 +386,7 @@ FILE can be an Org file, indicated by its \".org\" extension,
 otherwise it's assumed to be an Info file."
   (let* ((pkg-name (package-desc-name pkg-desc))
          (default-directory (package-desc-dir pkg-desc))
-         (docs-directory (expand-file-name (file-name-directory file)))
+         (docs-directory (file-name-directory (expand-file-name file)))
          (output (expand-file-name (format "%s.info" pkg-name)))
          clean-up)
     (when (string-match-p "\\.org\\'" file)

lisp/net/tramp.el

@@ -1950,8 +1950,11 @@ version, the function does nothing."
   "Return contents of BUFFER.
 If BUFFER is not a buffer or a buffer name, return the contents
 of `current-buffer'."
-  (with-current-buffer (or buffer (current-buffer))
-    (substring-no-properties (buffer-string))))
+  (or (let ((buf (or buffer (current-buffer))))
+        (when (bufferp buf)
+          (with-current-buffer (or buffer (current-buffer))
+	    (substring-no-properties (buffer-string)))))
+      ""))
 
 (defun tramp-debug-buffer-name (vec)
   "A name for the debug buffer for VEC."