[PATCH 5 of 8] pager: use super class's _runpager if possible

[Jun Wu]

Excerpts from Jun Wu's message of 2017-01-10 07:12:25 +0800:
> # HG changeset patch
> # User Jun Wu <quark at fb.com>
> # Date 1484002766 -28800
> #      Tue Jan 10 06:59:26 2017 +0800
> # Node ID 24ebef0f19843c6b1b8fbf32d99a7e8dba2fb734
> # Parent  483eabc8ccbbdfabed7f0f0abd74fb131adcd3c3
> # Available At https://bitbucket.org/quark-zju/hg-draft 
> #              hg pull https://bitbucket.org/quark-zju/hg-draft  -r 24ebef0f1984
> pager: use super class's _runpager if possible
> 
> The ui class is currently pagerui(chgui(ui)), so chgui's _runpager will be
> overrided by pagerui. Detect it and use chgui's _runpager, in pager.py.
> 
> In the future, when pager is moved to core, pagerui will no longer exist and
> ui.py has _runpager implemented directly, and we can just call ui._runpager
> without any check.
> 
> diff --git a/hgext/pager.py b/hgext/pager.py
> --- a/hgext/pager.py
> +++ b/hgext/pager.py
> @@ -121,5 +121,6 @@ def uisetup(ui):
>      class pagerui(ui.__class__):
>          def _runpager(self, pagercmd):
> -            _runpager(self, pagercmd)
> +            runpager = getattr(super(pagerui, self), '_runpager', _runpager)

I realized that this is wrong (super(...) is not a class but an instance).
Fortunately it seems that this patch could be just dropped without affecting
correctness because how chg works currently.

> +            runpager(self, pagercmd)
>  
>      ui.__class__ = pagerui