master updated (d345c71 -> 4819bea)

[Glenn Morris]

gm pushed a change to branch master.

      from  d345c71   Safeguard the fix of bug#40632
      adds  0ed7177   * lisp/htmlfontify.el (hfy-force-fontification): Fix 
bug#40642
       new  a6c3910   ; Merge from origin/emacs-27
      adds  fb5f616   Improve an example in w32 FAQ
      adds  660b9b8   Default completion-flex-nospace to nil
      adds  145a151   Correct Fido-mode's backspacing of directories with spaces
       new  2a4cb24   Merge from origin/emacs-27
      adds  399c20d   Bump Emacs version to 27.0.91
       new  9dac60b   ; Merge from origin/emacs-27
      adds  9e832ba   * lisp/erc/erc.el: Add URL to the new ERC page on the 
Emacs site
      adds  3876a60   Fix a typo in calculator.el
      adds  c36c5a3   ; lisp/ldefs-boot.el: Update.
      adds  6b29751   Fix cl-most-positive-float doc typo
      adds  175c61c   Fix "C-u M-!" when 'shell-command-dont-erase-buffer' is 
non-nil
      adds  f3b62b6   Avoid crashes in regex-emacs.c due to GC
       new  4819bea   Merge from origin/emacs-27


Summary of changes:
 doc/emacs/misc.texi       | 27 +++++++++++++++++++--------
 doc/misc/cl.texi          |  2 +-
 doc/misc/efaq-w32.texi    |  9 ++++++---
 etc/NEWS.27               | 11 ++++++++---
 lisp/calculator.el        |  2 +-
 lisp/erc/erc.el           | 17 ++++-------------
 lisp/icomplete.el         |  3 ++-
 lisp/ldefs-boot.el        |  2 +-
 lisp/minibuffer.el        |  2 +-
 lisp/simple.el            | 35 ++++++++++++++++++++++-------------
 src/regex-emacs.c         | 22 ++++++++++++++++++++++
 test/lisp/simple-tests.el |  4 ++--
 12 files changed, 89 insertions(+), 47 deletions(-)