Starting from this commit [1] regexp-opt no longer returns an unenclosed
regular _expression_.
I'd argue that this sole change requires me to special-case (or ..) form
of rx macro for one arguments to avoid the unnecessary shy-grouping
there, but the message of said commit contains no information about the
background of that change, so it's hard to say if its benefits overweigh
the inconveniences. What's important though is that the docstring was
never updated along and still describes PAREN as accepting nil to avoid
grouping:
If optional PAREN is non-nil, ensure that the returned regexp
is enclosed by at least one regexp grouping construct.
Also, the doc omits that PAREN may be a string to use as an open-paren.
1.
http://git.savannah.gnu.org/cgit/emacs.git/commit/lisp/emacs-lisp/regexp-opt.el?id=540849ee60de0ac129ac63e6ffb5f707c648af1b
In GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.2)
of 2014-02-22 on king, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
System Description: Ubuntu 12.04.4 LTS
Configured using:
`configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'
'--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
'--localstatedir=/var/lib' '--infodir=/usr/share/info'
'--mandir=/usr/share/man' '--with-pop=yes'
'--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.3/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.3/site-lisp:/usr/share/emacs/site-lisp'
'--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
'--with-x-toolkit=gtk3' '--with-toolkit-scroll-bars'
'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Wformat-security
-Werror=format-security -Wall' 'LDFLAGS=-Wl,-Bsymbolic-functions
-Wl,-z,relro' 'CPPFLAGS=-D_FORTIFY_SOURCE=2''
Important settings:
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Fundamental
Minor modes in effect:
csv-field-index-mode: t
ido-vertical-mode: t
ido-ubiquitous-mode: t
global-undo-tree-mode: t
undo-tree-mode: t
global-page-break-lines-mode: t
projectile-global-mode: t
projectile-mode: t
global-linum-mode: t
linum-mode: t
yas-global-mode: t
yas-minor-mode: t
show-paren-mode: t
auto-compile-on-save-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
size-indication-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
M-x r e p o r t - e m a <tab> <return>
Recent messages:
require 'region-bindings-mode
el-get: Evaluating :after form for package region-bindings-mode
el-get initialized package region-bindings-mode
el-get initialized package yaml-mode
require 'cython-mode
el-get initialized package cython-mode
el-get: evaluating autoload file
Loading ~/.emacs.d/el-get/.loaddefs...done
(lambda (x) ...) quoted with ' rather than with #' [4 times]
For information about GNU Emacs and the GNU system, type C-h C-a.
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Features:
(shadow mail-extr emacsbug message format-spec rfc822 mml mml-sec
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mail-utils
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mmr-cc-settings cc-styles cc-align cc-engine cc-vars cc-defs mmr-el-get
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python-el-fgallina-expansions python rx region-bindings-mode guide-key
face-remap popwin smartrep undo-tree diff diminish ein ein-loaddefs smex
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url-cookie url-domsuf url-util url-parse auth-source eieio gnus-util
mm-util mail-prsvr password-cache url-vars mailcap xml-parse doxymacs
filladapt goto-chg page-break-lines helm-config helm-aliases deferred
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el-get-emacswiki el-get-http el-get-emacsmirror el-get-github el-get-git
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overlay sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty emacs)