annotate .arcconfig @ 42255:00e065fb1469

copies: remove redundant filtering of ping-pong renames in _chain()

We already handle the ping-pong rename case in the filtering step, so
there's very little point in doing it in the chaining loop (ping-pong
renames are very rare, so I'm not worried about the cost of adding it
and then removing it again).

Differential Revision: https://phab.mercurial-scm.org/D6344

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