message uses minibuffer-message in the active minibuffer (bug#17272 bug#19064)

* doc/lispref/display.texi (Displaying Messages): Explain the
behavior of using minibuffer-message if the minibuffer is active.

* src/editfns.c (Fmessage_in_echo_area): New function with body
copied from Fmessage.
(Fmessage): Call minibuffer-message in the active minibuffer,
otherwise call Fmessage_in_echo_area.
(message-in-echo-area): New variable.

* lisp/isearch.el (isearch--momentary-message, isearch-message):
* lisp/minibuffer.el (minibuffer-message, minibuffer-completion-help):
Use 'message-in-echo-area' instead of 'message' where necessary.

* lisp/autorevert.el (auto-revert-handler):
* lisp/man.el (Man-bgproc-sentinel):
* lisp/subr.el (do-after-load-evaluation):
Revert recent changes that replaced 'message' with 'minibuffer-message'.
This is not needed anymore since 'message' uses 'minibuffer-message'
in the active minibuffer.

1 files changed, 4 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 662156d684d..eb32d70f571 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -755,6 +755,10 @@ the minibuffer.  If non-nil, point will move to the end of the prompt
 at the end of the active minibuffer.
 
 +++
+*** The function 'message' now displays the message at the end of the minibuffer
+when the minibuffer is active.
+
++++
 *** 'y-or-n-p' now uses the minibuffer to read 'y' or 'n' answer.
 
 *** Some commands that previously used read-char-choice now read