bug#5056: Minor fix for a defcustom in savehist mode (patch included)

["Ryan C. Thompson" <rct@thompsonclan.org>]

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While customizing savehist mode through the emacs Custom interface, I
discovered that I could not set `savehist-autosave-interval' to nil
because the custom buffer only had an integer entry field for that
variable, although the docstring said that nil was a valid value. So I
edited the custom definition to allow choosing either nil or an integer,
instead of just an integer. I also added labels to the two choices to
make things clearer for the user. Here is the one-line diff (assuming
that it doesn't get too badly mangled in transit):

BEGIN DIFF
*** old/savehist.el    2009-11-26 21:47:52.378311830 -0800
--- new/savehist.el    2009-11-26 21:19:12.118518476 -0800
***************
*** 120,126 ****
  (defcustom savehist-autosave-interval (* 5 60)
    "The interval between autosaves of minibuffer history.
  If set to nil, disables timer-based autosaving."
!   :type 'integer
    :group 'savehist)

  (defcustom savehist-mode-hook nil
--- 120,127 ----
  (defcustom savehist-autosave-interval (* 5 60)
    "The interval between autosaves of minibuffer history.
  If set to nil, disables timer-based autosaving."
!   :type '(choice (const :tag "Disabled" nil)
!                  (integer :tag "Seconds" 300))
    :group 'savehist)

  (defcustom savehist-mode-hook nil
END DIFF

Here is my attempt at manually writing a changelog entry:

BEGIN CHANGELOG
     2009-11-62  Ryan C. Thompson  <rct@thompsonclan.org>

             * savehist.el: Allow setting `savehist-autosave-interval'
               to nil in Custom.
END CHANGELOG

If it matters, you have my blessing to license this code however you please.

- Ryan Thompson

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From: Hrvoje Niksic <hniksic@xemacs.org>
To: "Ryan C. Thompson" <rct@thompsonclan.org>
Subject: Re: minor bugfix for savehist mode
Date: Mon, 31 Aug 2009 13:37:23 +0200
Message-ID: <87pracgqoc.fsf@busola.homelinux.net>

"Ryan C. Thompson" <rct@thompsonclan.org> writes:

> I would like to submit a minor improvement for savehist mode. I
> noticed that the variable savehist-autosave-interval could be either
> an integer or nil, but its definition allowed it to be customized only
> as an integer. I changed the definition to allow it to also be set to
> nil in Custom.

Please post your bugfix to Emacs maintainers so it gets incorporated
into the next release.  I no longer actively maintain savehist-mode.

Thank you.