master updated (108dbed -> e4b7fa0)

[Amin Bandali]

bandali pushed a change to branch master.

      from  108dbed   Re-fix bug#16897
      adds  edc93a5   ; Fix grammar in efaq.texi on Emacs vs XEmacs.
      adds  252a769   ; * doc/lispref/files.texi (Changing Files): Fix xref to 
file-modes.
      adds  fb1f0df   ERC: Track: Fix documentation of structure of 
'erc-modified-channels-alist'
      adds  d7f4cc0   ERC: Track: Clarify documentation on tracked buffers and 
add references
       new  e4b7fa0   Merge from origin/emacs-27


Summary of changes:
 doc/lispref/files.texi |  2 +-
 doc/misc/efaq.texi     | 14 +++++++++++---
 lisp/erc/erc-track.el  | 34 ++++++++++++++++++++++++----------
 3 files changed, 36 insertions(+), 14 deletions(-)