Start Emacs with "emacs -Q" and type the following in the "*scratch*" buffer:
(read-char "char: ")
With the point after the right paren type now "C-x C-e"
(`eval-last-sexp'). If you press this key-sequence slowly, waiting one
second (the value of `echo-keystrokes') between "C-x" and "C-e" the
prompt string ("char: ") will be obscured by the echo area showing the
keystrokes "C-x C-e-" (note the trailing dash!).
In GNU Emacs 24.5.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.14.5)
of 2015-04-15 on xz
Windowing system distributor `The X.Org Foundation', version 11.0.11604000
System Description: Debian GNU/Linux 8.1 (jessie)
Configured using:
`configure --without-compress-install --with-zlib --with-imagemagick
--with-xml2 --with-svg --prefix=/usr/local/stow/emacs-24.5'
Important settings:
value of $LC_ALL: en_US.UTF-8
value of $LC_CTYPE: en_US.UTF-8
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
Major mode: Lisp Interaction