revlog: add some information about the revision we cannot find
Parameter to Exception are good, use them.
Differential Revision: https://phab.mercurial-scm.org/D11933
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"phabricator.uri": "https://phab.mercurial-scm.org/",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}