test-copies: filter out the linkrev part of `debugindex`
It is not really useful for the tests and is a large source of churn when adding
more revisions to the tests.
Differential Revision: https://phab.mercurial-scm.org/D10050
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}