bug#21994: Possible calendar mode bug

[Eli Zaretskii <eliz@gnu.org>]

Resending to the bug address:

> Date: Mon, 7 Dec 2015 13:46:49 +0000
> From: jan <rtm443x@googlemail.com>
> 
> Hi Eli,
> found the problem.
> Not to do with permissions but it was giving a hint that the calendar
> was trying to look at the diary (see original email), when I was
> trying to dump it out with
> 
> H y
> 
> Trying to look at the diary:
> 
> M-x diary <RET>
> 
> *messages* says:
> 
> Preparing diary...
> diary-list-entries: Wrong type argument: stringp, nil
> 
> Turns out you have to manually create the 'diary' file (and then
> possibly look at the diary by pressing 'd' in Calendar mode, but not
> sure this is necessary).
> 
> Seems a bit naff that 'd' and 'H y' should both bomb miserably if the
> diary file isn't present.
> 
> Bug, or just me being a bit of an emacs n00b in this area?
> 
> The manual says:
> "Although you probably will start by creating a diary manually, Emacs
> provides a number of commands to let you view, add, and change diary
> entries."
> 
> This does not say that you must create it manually. I dunno...
> 
> More info if requested.

Thanks.