master updated (f8581bc -> d436e48)

[Glenn Morris]

gm pushed a change to branch master.

      from  f8581bc   Reject invalid characters in XML strings (Bug#41094).
      adds  6ac2326   Don’t use “constant” for values you shouldn’t change
      adds  b48ab74   Minor fixups for mutability doc
      adds  03d44ac   * doc/lispref/control.texi (Processing of Errors): 
Improve indexing.
      adds  4b9fbdb   ; Update TODO item about ligature support
       new  fabcc1e   Merge from origin/emacs-27
      adds  0eeeedf   ; * etc/PROBLEMS: Add note about color list issues on 
macOS.
       new  bd5c3d1   ; Merge from origin/emacs-27
      adds  8cc453d   Second attempt at improving indexing in control.texi
       new  ce70cfb   Merge from origin/emacs-27
      adds  62a5e89   Redo RCS Id for pdumper
      adds  c0aa2f2   CC Mode: Fix bug #39972, by fixing c-display-defun-name 
for nested defuns
       new  294495d   ; Merge from origin/emacs-27
      adds  a10254d   Fix accessing files on networked drives on MS-Windows
      adds  13b6dfd   * doc/emacs/killing.texi (Rectangles): Improve indexing.
      adds  fb2e34c   ; * etc/TODO (Ligatures): Update the entry based on 
recent discussions.
      adds  c7737d4   ; * etc/TODO (Ligatures): Update the entry based on 
recent discussions.
      adds  1a6d59e   Improve the documentation of setting up fontsets
      adds  d6a0b66   * lisp/subr.el (save-match-data): Clarify use in docstring
       new  d436e48   Merge from origin/emacs-27


Summary of changes:
 doc/emacs/killing.texi              |  2 +
 doc/emacs/mule.texi                 | 84 ++++++++++++++++++++++++---------
 doc/lispintro/emacs-lisp-intro.texi |  5 +-
 doc/lispref/control.texi            |  1 +
 doc/lispref/display.texi            |  6 +--
 doc/lispref/elisp.texi              |  2 +-
 doc/lispref/eval.texi               | 21 +++++----
 doc/lispref/lists.texi              | 16 +++----
 doc/lispref/objects.texi            | 93 +++++++++++++++++++------------------
 doc/lispref/sequences.texi          | 25 +++++-----
 doc/lispref/strings.texi            | 11 ++---
 etc/TODO                            | 64 +++++++++++++++++++++----
 lisp/subr.el                        |  6 ++-
 src/w32.c                           | 12 ++++-
 14 files changed, 225 insertions(+), 123 deletions(-)