obshistory: omit duplicate notes of obsolescence operations When folding changesets, it's possible to provide a --note flag to e.g. fold or prune, which will store a note for that operation. But since there would be more than one marker for the fold operation and the provided note would be stored in all of them, _markersnotes() previously would return the same text message many times. We don't really want to see the same thing over and over, so let's make notes a set(). This will also make unrelated operations with the same note show the message only once, which is probably an improvement too.

Test that share-clones use the cache in the original repository.

  $ . $TESTDIR/testlib/common.sh

  $ hg init share-base
  $ cd share-base/
  $ cat >> .hg/hgrc <<EOF
  > [extensions]
  > evolve=
  > share=
  > EOF
  $ hg debugbuilddag .+3:branchpoint+4*branchpoint+2
  $ cd ..
  $ hg --config extensions.share= share -U share-base share-client
  $ cd share-client
  $ hg debugupdatecache
  $ test -d .hg/cache
  [1]
  $ test -d ../share-base/.hg/cache