evolve: revision graph

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evolve: remove an evolvestate which is no more required
Fri, 21 Aug 2020 00:56:24 +0530, by Sushil khanchi
evolve: remove swapping nodes logic while resolving divergence
Sun, 20 Sep 2020 09:22:04 +0530, by Sushil khanchi
evolve: don't set evolved node as dirstate p2
Fri, 25 Sep 2020 11:06:46 -0700, by Martin von Zweigbergk

less more | rev 5573: (0) -3000 -1000 -300 -100 -30 -10 -3 +3 +10 +30 +100 +300 +1000 tip