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copies: fast path no-op merge

Authored by marmoute.

Description

copies: fast path no-op merge

If the two sides of the merge are the same (they come an unaltered common
ancestors) we don't need any merging.

Differential Revision: https://phab.mercurial-scm.org/D9415

Details

Committed
marmouteNov 20 2020, 4:49 AM
Differential Revision
D9415: copies: fast path no-op merge
Parents
rHG2367937982ba: copies-rust: encapsulate internal sets on `changes`
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