emacs-27 updated (ef5f3d5 -> d898d3c)

[Eli Zaretskii]

eliz pushed a change to branch emacs-27.

      from  ef5f3d5   C++ Mode: Handle new keywords static_cast, etc., wrt 
angle brackets
       new  de52dbd   Update doc/emacs/ for a new printing of the Emacs Manual 
book
       new  d898d3c   ; * doc/emacs/back.texi: Fix a typo.


Summary of changes:
 doc/emacs/back.texi       | 98 +++++++++++++++++++++++++++++++++++++++++++++++
 doc/emacs/book-spine.texi | 20 ++++++++++
 doc/emacs/emacs.texi      |  2 +-
 3 files changed, 119 insertions(+), 1 deletion(-)
 create mode 100644 doc/emacs/back.texi
 create mode 100644 doc/emacs/book-spine.texi