bug#21489: 25.0.50; Echoing and message interaction

[Jay Belanger]

Emacs used to not always cover up messages with keystroke
echoing.  For example, in Emacs 24.5, setting

(local-set-key "ab"
               (lambda ()
                 (interactive)
                 (message "Hello")
                 (push ?a unread-command-events)))

and then keying in "ab" would display
  Hello
in the minibuffer.  In the git master, it will display
  a-

The old behavior was useful.



In GNU Emacs 25.0.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
 of 2015-07-07 on vh213601
Repository revision: 6aa1d7635c02e2268acc62ab3017621d83796467
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
System Description:     Debian GNU/Linux 7.8 (wheezy)

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GCONF GSETTINGS NOTIFY
GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
GTK2 X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Article

Minor modes in effect:
  show-paren-mode: t
  display-time-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
nnimap read 51k from imap.gmail.com
Reading active file via nndraft...done
Checking new news...done
nnimap read 0k from imap.gmail.com
Processing kill file /home/belanger/.emacs.d/mail/KILL...
Starting new Ispell process /usr/bin/aspell with default dictionary...
Processing kill file /home/belanger/.emacs.d/mail/KILL...done
Mark set [4 times]
Quit
Making completion list...
Quit [3 times]

Load-path shadows:
None found.

Features:
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gnus-cite mail-extr gnus-async gnus-bcklg flyspell ispell gnus-kill
gnus-ml disp-table gnus-topic nndraft nnmh utf-7 gnutls network-stream
nsm gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg
gnus-art mm-uu mml2015 epg-config mm-view mml-smime smime dig mailcap
nntp gnus-cache gnus-sum gnus-group gnus-undo gnus-start gnus-cloud
nnimap nnmail mail-source tls utf7 netrc nnoo parse-time gnus-spec
gnus-int gnus-range message dired-details advice dired-x dired
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rfc2231 mailabbrev gmm-utils mailheader gnus-win gnus gnus-ems nnheader
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bytecomp byte-compile cl-extra seq cconv eieio-core cl-macs gv gnus-util
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time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core frame cl-generic cham
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hashtable-print-readable backquote dbusbind gfilenotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 336645 20237)
 (symbols 48 30566 0)
 (miscs 40 235 365)
 (strings 32 45021 7896)
 (string-bytes 1 1520246)
 (vectors 16 23207)
 (vector-slots 8 558254 9089)
 (floats 8 337 253)
 (intervals 56 743 41)
 (buffers 976 28)
 (heap 1024 26597 6976))