master updated (9b318d5 -> 8d957f2)

[Amin Bandali]

bandali pushed a change to branch master.

      from  9b318d5   Speed up fido-mode
      adds  de52dbd   Update doc/emacs/ for a new printing of the Emacs Manual 
book
      adds  d898d3c   ; * doc/emacs/back.texi: Fix a typo.
       new  5d1cf01   Merge from origin/emacs-27
      adds  d70dc69   ; Auto-commit of loaddefs files.
       new  136b30b   ; Merge from origin/emacs-27
      adds  b0e725e   Fix typo in c-macro-expand docstring
      adds  348b2ae   Update IRC-related references to point to Libera.Chat
       new  8d957f2   Merge from origin/emacs-27


Summary of changes:
 doc/emacs/back.texi       | 98 +++++++++++++++++++++++++++++++++++++++++++++++
 doc/emacs/book-spine.texi | 20 ++++++++++
 doc/emacs/emacs.texi      |  2 +-
 doc/misc/erc.texi         | 58 ++++++++++++++++------------
 doc/misc/gnus-faq.texi    |  2 +-
 doc/misc/rcirc.texi       | 41 ++++++++++++--------
 etc/NEWS.27               | 23 +++++++++++
 lisp/erc/erc-backend.el   |  2 +-
 lisp/erc/erc-networks.el  | 14 +++++--
 lisp/erc/erc-services.el  | 17 ++++----
 lisp/erc/erc.el           | 11 +++---
 lisp/net/rcirc.el         |  8 ++--
 lisp/org/ol-irc.el        |  6 +--
 lisp/progmodes/cmacexp.el |  2 +-
 14 files changed, 237 insertions(+), 67 deletions(-)
 create mode 100644 doc/emacs/back.texi
 create mode 100644 doc/emacs/book-spine.texi