diff --git a/doc/misc/message.texi b/doc/misc/message.texi
index 048990d53a7..6ec761506d0 100644
--- a/doc/misc/message.texi
+++ b/doc/misc/message.texi
@@ -1326,7 +1326,13 @@ OpenPGP) or @code{mml-secure-smime-encrypt-to-self} (for
 The @code{Bcc} header is meant to hide recipients of messages.
 However, when encrypted messages are used, the e-mail addresses of all
 @code{Bcc}-headers are given away to all recipients without
-warning, which is a bug, see
+warning, which is a bug.
+@vindex mml-secure-safe-bcc-list
+But now Message got to warn if @code{Bcc} recipients are found in an
+encrypted message when you are just about to send it.  If you are sure
+those @code{Bcc} addresses are safe to expose, set the
+@code{mml-secure-safe-bcc-list} variable, that is a list of e-mail
+addresses.  See
 @uref{https://debbugs.gnu.org/cgi/bugreport.cgi?bug=18718}.
 
 
diff --git a/src/editfns.c b/src/editfns.c
index 0bcc439e50e..dcb1d8d6b88 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -2936,6 +2936,10 @@ Return -N if first string is less after N-1 chars, +N if first string is
 greater after N-1 chars, or 0 if strings match.
 The first substring is in BUFFER1 from START1 to END1 and the second
 is in BUFFER2 from START2 to END2.
+All arguments may be nil.  If BUFFER1 or BUFFER2 is nil, the current
+buffer is used.  If START1 or START2 is nil, the value of `point-min'
+in the respective buffers is used.  If END1 or END2 is nil, the value
+of `point-max' in the respective buffers is used.
 The value of `case-fold-search' in the current buffer
 determines whether case is significant or ignored.  */)
   (Lisp_Object buffer1, Lisp_Object start1, Lisp_Object end1, Lisp_Object buffer2, Lisp_Object start2, Lisp_Object end2)