Refactor invariants for FamInsts.
This commit mirrors work done in the commit for ClsInsts, 5efe9b... Specifically: - All FamInsts have *fresh* type variables. So, no more freshness work in addLocalFamInst Also: - Some pretty-printing code around FamInsts was cleaned up a bit This caused location information to be added to CoAxioms and index information to be added to FamInstBranches.
Showing with 326 additions and 200 deletions