diff --git a/doc/lispref/minibuf.texi b/doc/lispref/minibuf.texi
index ecd34b95294..42189b9d0d7 100644
--- a/doc/lispref/minibuf.texi
+++ b/doc/lispref/minibuf.texi
@@ -1242,6 +1242,16 @@ different function to completely override the normal behavior of
 @code{completing-read}.
 @end defvar
 
+@findex completing-read-multiple
+@vindex crm-separator
+If you need to prompt the user for several strings, like several
+elements of a list or several parameters (e.g., user, host, and port) of
+a connection, you can use @code{completing-read-multiple}.  It allows
+typing several strings separated by a separator string (by default, tabs
+and commas; customize @code{crm-separator} to change that), and provides
+completion for each individual string the user types.  It returns the
+strings that were read, as a list.
+
 @node Completion Commands
 @subsection Minibuffer Commands that Do Completion
 
diff --git a/doc/misc/message.texi b/doc/misc/message.texi
index 509bbd5b575..48ac487088e 100644
--- a/doc/misc/message.texi
+++ b/doc/misc/message.texi
@@ -289,12 +289,7 @@ supersede the message in the current buffer.
 
 @vindex message-ignored-supersedes-headers
 Headers matching the @code{message-ignored-supersedes-headers} are
-removed before popping up the new message buffer.  The default is@*
-@samp{^Path:\\|^Date\\|^NNTP-Posting-Host:\\|^Xref:\\|^Lines:\\|@*
-^Received:\\|^X-From-Line:\\|^X-Trace:\\|^X-Complaints-To:\\|@*
-Return-Path:\\|^Supersedes:\\|^NNTP-Posting-Date:\\|^X-Trace:\\|@*
-^X-Complaints-To:\\|^Cancel-Lock:\\|^Cancel-Key:\\|^X-Hashcash:\\|@*
-^X-Payment:\\|^Approved:}.
+removed before popping up the new message buffer.
 
 
 
diff --git a/lisp/emacs-lisp/crm.el b/lisp/emacs-lisp/crm.el
index 454c3e85074..a371a8e14de 100644
--- a/lisp/emacs-lisp/crm.el
+++ b/lisp/emacs-lisp/crm.el
@@ -251,22 +251,16 @@ with empty strings removed."
           (setq-local minibuffer-completion-table #'crm--collection-fn)
           (setq-local minibuffer-completion-predicate predicate)
           (setq-local completion-list-insert-choice-function
-                      (lambda (start end choice)
-                        (if (and (stringp start) (stringp end))
-                            (let* ((beg (save-excursion
-                                          (goto-char (minibuffer-prompt-end))
-                                          (or (search-forward start nil t)
-                                              (search-forward-regexp crm-separator nil t)
-                                              (minibuffer-prompt-end))))
-                                   (end (save-excursion
-                                          (goto-char (point-max))
-                                          (or (search-backward end nil t)
-                                              (progn
-                                                (goto-char beg)
-                                                (search-forward-regexp crm-separator nil t))
-                                              (point-max)))))
-                              (completion--replace beg end choice))
-                          (completion--replace start end choice))))
+                      (lambda (_start _end choice)
+                        (let* ((beg (save-excursion
+                                      (if (search-backward-regexp crm-separator nil t)
+                                          (1+ (point))
+                                        (minibuffer-prompt-end))))
+                               (end (save-excursion
+                                      (if (search-forward-regexp crm-separator nil t)
+                                          (1- (point))
+                                        (point-max)))))
+                          (completion--replace beg end choice))))
           ;; see completing_read in src/minibuf.c
           (setq-local minibuffer-completion-confirm
                       (unless (eq require-match t) require-match))
diff --git a/lisp/gnus/nnweb.el b/lisp/gnus/nnweb.el
index 57964f93437..9ada2dbc1d7 100644
--- a/lisp/gnus/nnweb.el
+++ b/lisp/gnus/nnweb.el
@@ -42,7 +42,7 @@
 
 (defvoo nnweb-type 'google
   "What search engine type is being used.
-Valid types include `google' and `dejanews'.")
+The only valid type is currently `google'.")
 
 (defvar nnweb-type-definition
   '((google