Merge from origin/emacs-29

4df510c7a70 Fix VC package build when doc file isn't in a subdir
382f5fa8130 ; * doc/emacs/package.texi (Fetching Package Sources): Fi...
fc7e7c3fde3 Fix type check in tramp-get-buffer-string
2aa57fe6cf9 ; Fix typo in maintaining.texi (bug#64279)

diff --cc doc/emacs/package.texi
Simple merge

diff --cc lisp/emacs-lisp/package-vc.el
Simple merge

diff --cc lisp/net/tramp.el
Simple merge