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bug#24181: 25.1.50; ruby mode: wrong auto indent after "?" string litera

From: Ryo Furue
Subject: bug#24181: 25.1.50; ruby mode: wrong auto indent after "?" string literal
Date: Mon, 8 Aug 2016 12:50:30 +0900

Hi emacs maintainers,

1. Open an empty Ruby source code, say "tmp.rb".
2. Type the following:

base = ?a.ord - 1

On hitting the return key at the end of the second line, the cursor
moves below "a", not to the top of the third line. The indentation
state seems to be confused.  I did this test with "emacs -q" .

?a is a valid Ruby syntax for string literal.  After writing this, I learned
that "a".ord is equivalent (I think), so I already have a workaround.

Hope this helps,


In GNU Emacs (x86_64-apple-darwin15.6.0, NS appkit-1404.47
Version 10.11.6 (Build 15G31))
 of 2016-07-27 built on furufuru-mac.yes.jamstec.go.jp
Repository revision: 682fdae7efe5a36636539b953a657445f2f3382b
Windowing system distributor 'Apple', version 10.3.1404
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
(New file)
C-h C-g is undefined
Making completion list... [2 times]

Configured using:
 'configure --disable-dependency-tracking --disable-silent-rules
 --prefix=/usr/local/Cellar/emacs/HEAD-682fdae --with-xml2
 --without-dbus --with-gnutls --with-rsvg --with-imagemagick --with-ns

Configured features:

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

Major mode: Ruby

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-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
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

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sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
ruby-mode smie easymenu time-date mule-util tooltip eldoc electric
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ucs-normalize term/common-win 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
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loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote kqueue cocoa ns multi-tty
make-network-process emacs)

Memory information:
((conses 16 208190 9578)
 (symbols 48 20842 0)
 (miscs 40 74 216)
 (strings 32 19355 5290)
 (string-bytes 1 615360)
 (vectors 16 34870)
 (vector-slots 8 670676 5823)
 (floats 8 177 312)
 (intervals 56 241 2)
 (buffers 976 14))

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