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bug#26012: 25.2; help-echo should show in echo area when point is in tex

From: Tom Tromey
Subject: bug#26012: 25.2; help-echo should show in echo area when point is in text
Date: Tue, 07 Mar 2017 08:10:19 -0700

Make sure you have font-lock enabled, open a new .el file and insert:

'(("^[ \t]*\\(?:\\* .*\\)?\\(([^\n)]*,\\s-*\\)$"
   (1 '(face font-lock-warning-face
             help-echo "Continue function lists with \")\\n(\".") t))

(This snippet comes from log-edit.el)

For me the final "t))" is given font-lock-warning-face.
It also has this text property:

  help-echo            "Hidden behind deeper element; move to another line?"

... which is very useful information!

However, the only way I can see this (other than describe-char) is to
hover over the highlighted text with the mouse.

I think it would be handier if this text were displayed somewhere when
point was in this area.  Some other error-displaying programs, like
flycheck (I didn't look at flymake) will do this already; I just think
it should be standard across Emacs.


In GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.22.8)
 of 2017-03-02 built on bapiya
Repository revision: 6e788ef0e262fafc014c21f4ad52cc5dc9f1715b
Windowing system distributor 'Fedora Project', version 11.0.11901000
System Description:     Fedora release 25 (Twenty Five)

Configured using:
 'configure --prefix=/home/tromey/Emacs/install/ --with-modules'

Configured features:

Important settings:
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Group

Minor modes in effect:
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  gnus-undo-mode: t
  shell-dirtrack-mode: t
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  erc-button-mode: t
  erc-fill-mode: t
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  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 0k from mail.tromey.com
No more unseen articles
Expiring articles...done
Mark set
(New file)
Mark set
previous-line: Beginning of buffer
funcall-interactively: End of buffer
Saving file /tmp/q.el...
Wrote /tmp/q.el

Load-path shadows:
/home/tromey/.emacs.d/elpa/bubbles-0.5/bubbles hides 
/home/tromey/.emacs.d/elpa/soap-client-3.1.1/soap-inspect hides 
/home/tromey/.emacs.d/elpa/soap-client-3.1.1/soap-client hides 

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x-toolkit x multi-tty make-network-process emacs)

Memory information:
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 (vectors 16 100488)
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