[PATCH 1 of 5] scmutil: make cleanupnodes handle filtered node

[Jun Wu]

Excerpts from Martin von Zweigbergk's message of 2017-06-27 23:22:28 -0700:
> > +  >     with repo.wlock():
> > +  >         with repo.lock():
> > +  >             with repo.transaction('delayedstrip'):
> 
> We're on Python 2.7 now, so you can combine these three into a single
> with-block.

Good idea.

> > +  >                 # intentionally call cleanupnodes twice to let it handle
> 
> Twice? It looks like it's once.

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