Merge from origin/emacs-29

Merge from origin/emacs-29

689f04a2ddf Clarify description of format-spec truncation
759dedfab07 More accurate documentation of 'rmail-mail-new-frame'
fa79de7c6b8 ; * lisp/calendar/calendar.el: Remove extra space.
7f6e335f4b4 Fix documentation of M-SPC in user manual
5bdc2436c64 ; * lisp/emacs-lisp/cl-macs.el (cl-labels): Fix stray dif...
8014dbb2ad8 * admin/notes/bugtracker: Minor copyedit.
06a991e7e87 ; * admin/notes/bugtracker: Minor copyedit.
c890622e1a9 Tweak regexp for object initializers in csharp-mode (bug#...
f48babb1120 `term-mode': mention the keymap to add keybindings to
8cf05d9be12 Fix 'shortdoc-copy-function-as-kill'
d5901f3f05e Improve documentation of 'edebug-print-*' variables