branchmap: improve doc about BranchMapCache class

Authored by pulkit.

Description

branchmap: improve doc about BranchMapCache class

It was confusing that we are having two different branchcache and
BranchMapCache classes. The doc in BranchMapCache class was not much helpful
to understand the difference. This patch improves the doc there.

Differential Revision: https://phab.mercurial-scm.org/D5933

Details

Committed
pulkitFeb 11 2019, 8:34 AM
Differential Revision
D5933: branchmap: improve doc about BranchMapCache class
Parents
rHG9060af281be7: rust: itering less on MissingAncestors.bases for max()
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