view .arcconfig @ 34535:78590585c0db

templater: add dot operator to easily access a sub item

This and the next patch will allow us to access a deeply-nested item
by foo.bar.baz syntax.

{
    "conduit_uri": "https://phab.mercurial-scm.org/api",
    "repository.callsign": "HG",
    "arc.land.onto.default": "@",
    "base": "hg:.^"
}