bug#28916: 25.1; octave-block-offset should be safe as file-local variable

bug#28916: 25.1; octave-block-offset should be safe as file-local variable

[Benjamin Moody]

The variable 'octave-block-offset' determines the number of spaces used
for automatically indenting Octave code.

Like similar variables used in other modes (e.g. c-basic-offset), it is
often desirable to set this variable on a per-file or per-directory
basis, in order to conform with a project's existing indentation style.

Thus, this variable should be marked as "safe as a file local variable
if its value satisfies the predicate ‘integerp’."

The same would seem to apply to 'octave-continuation-offset', but that
variable doesn't appear to actually be used (continuation lines are
indented based on the syntactic context.)

--
In GNU Emacs 25.1.1 (x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2017-09-15, modified by Debian built on trouble
Windowing system distributor 'The X.Org Foundation', version 11.0.11902000
System Description:	Debian GNU/Linux 9.1 (stretch)

Configured using:
 'configure --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/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --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/emacs25:/etc/emacs:/usr/local/share/emacs/25.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/25.1/site-lisp:/usr/share/emacs/site-lisp
 --with-sound=alsa --with-x=yes --with-x-toolkit=gtk3
 --with-toolkit-scroll-bars 'CFLAGS=-g -O2
 -fdebug-prefix-map=/build/emacs25-wN2qS3/emacs25-25.1+1=. -fstack-protector-strong
 -Wformat -Werror=format-security -Wall' 'CPPFLAGS=-Wdate-time
 -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GCONF GSETTINGS
NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

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

Major mode: Emacs-Lisp

Minor modes in effect:
  diff-auto-refine-mode: t
  iswitchb-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-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
  buffer-read-only: t
  column-number-mode: t
  line-number-mode: t

Recent messages:
Loading /etc/emacs/site-start.d/50w3m-el.el (source)...done
Loading /etc/emacs/site-start.d/51debian-el.el (source)...done
Loading gnus...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Package iswitchb is obsolete!
Please type y, n, or !: y
Making completion list...
Type C-x 1 to delete the help window.
uncompressing octave.el.gz...done
Note: file is write protected

Load-path shadows:
/usr/share/emacs/25.1/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs25/site-lisp/flim/hex-util hides /usr/share/emacs/25.1/lisp/hex-util
/usr/share/emacs25/site-lisp/flim/md4 hides /usr/share/emacs/25.1/lisp/md4
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/25.1/lisp/textmodes/rst
/home/benjamin/elisp/js hides /usr/share/emacs/25.1/lisp/progmodes/js
/usr/share/emacs25/site-lisp/flim/hmac-md5 hides /usr/share/emacs/25.1/lisp/net/hmac-md5
/usr/share/emacs25/site-lisp/flim/sasl-digest hides /usr/share/emacs/25.1/lisp/net/sasl-digest
/usr/share/emacs25/site-lisp/flim/ntlm hides /usr/share/emacs/25.1/lisp/net/ntlm
/usr/share/emacs25/site-lisp/flim/sasl-ntlm hides /usr/share/emacs/25.1/lisp/net/sasl-ntlm
/usr/share/emacs25/site-lisp/flim/sasl-cram hides /usr/share/emacs/25.1/lisp/net/sasl-cram
/usr/share/emacs25/site-lisp/flim/hmac-def hides /usr/share/emacs/25.1/lisp/net/hmac-def
/usr/share/emacs25/site-lisp/flim/sasl hides /usr/share/emacs/25.1/lisp/net/sasl

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config mm-decode mm-bodies mm-encode
mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047
rfc2045 ietf-drums jka-compr find-func pp thingatpt vc-git diff-mode
easy-mmode octave smie comint ansi-color ring iswitchb edmacro kmacro
gnus gnus-ems nnheader gnus-util mail-utils mm-util help-fns help-mode
easymenu mail-prsvr wid-edit cl-loaddefs pcase cl-lib cus-start cus-load
debian-el debian-el-loaddefs w3m-load dpkg-dev-el dpkg-dev-el-loaddefs
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
georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer cl-preloaded nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote dbusbind inotify dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 120847 7652)
 (symbols 48 23557 0)
 (miscs 40 83 204)
 (strings 32 23757 5135)
 (string-bytes 1 673281)
 (vectors 16 14767)
 (vector-slots 8 461777 3416)
 (floats 8 184 73)
 (intervals 56 805 41)
 (buffers 976 22))

bug#28916: 25.1; octave-block-offset should be safe as file-local variable

[Lars Ingebrigtsen]

Benjamin Moody <benjaminmoody@gmail.com> writes:

> The variable 'octave-block-offset' determines the number of spaces used
> for automatically indenting Octave code.
>
> Like similar variables used in other modes (e.g. c-basic-offset), it is
> often desirable to set this variable on a per-file or per-directory
> basis, in order to conform with a project's existing indentation style.
>
> Thus, this variable should be marked as "safe as a file local variable
> if its value satisfies the predicate ‘integerp’."

Makes sense; I've now marked it as such on the Emacs trunk.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no