bug#33335: 26; Doc strings of `trash-directory' and `move-file-to-trash'

[Eli Zaretskii]

> Date: Sat, 10 Nov 2018 11:12:40 -0800 (PST)
> From: Drew Adams <drew.adams@oracle.com>
> 
> Both of these doc strings seem to say that if function
> `system-move-file-to-trash' is defined then it is used, regardless of
> the value of option `trash-directory'.
> 
> A cursory look at the code defining `move-file-to-trash' suggests
> otherwise.  And that would seem to make sense, giving users a way
> to customize the directory in all cases.
> 
> Are the doc strings wrong, or am I misreading the code?

It's a (subtle) bug, which I just fixed.

Thanks.