[PATCH] py3: prevent comparison with None in curses histedit (issue6196)

[Yuya Nishihara]

On Tue, 15 Oct 2019 12:14:59 +0200, Denis Laxalde wrote:
> # HG changeset patch
> # User Denis Laxalde <denis.laxalde at logilab.fr>
> # Date 1571134484 -7200
> #      Tue Oct 15 12:14:44 2019 +0200
> # Node ID ecfb39f6d22d9fb58b5b6981e346afc478e91ef5
> # Parent  6a350194de7f29d4f9dda183ab6df1d210bd58ff
> py3: prevent comparison with None in curses histedit (issue6196)

Queued, thanks.