aggressivemergedeltas: rename variable internally
The "aggressivemergedeltas" name is not great. First, it is quite long,
second, we would rather have less "Aggressive" names within the project. We
are about to rename the config option, so it seems the appropriate time to
rename the internal variable.
{
"conduit_uri": "https://phab.mercurial-scm.org/api",
"repository.callsign": "HG",
"arc.land.onto.default": "@",
"base": "hg:.^"
}