view .arcconfig @ 47679:731286dc5321

dirstate-v2: Reuse existing nodes when appending to a data file

When writing a dirstate in v2 format by appending to an existing data file,
nodes that are still "unparsed" from the previous on-disk representation
have been unchanged and can therefore be reused.

This makes the new data point to previously-existing data for tree nodes.

Differential Revision: https://phab.mercurial-scm.org/D11095

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