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b5477e2implement relation variable type safetyAgentM b605de7refactor RelationalError to be ADTAgentM 444ab48implement group and ungroup operators for Tutorial DAgentM 5cc025dallow multi-line values in terminal pretty-printerAgentM 5dbb181use let instead of unnecessary case complicationAgentM 550b966fix unused module and name warningsAgentM f407100tighten up ghc warningsAgentM 332a4b4fix recursive context passing in TutD REPRAgentM b0864f4small fix for ghc 7.6agentm 68cd254proper terminal rendering for true and false relationsAgentM 86998f1terminal relation displayAgentM c4b7fc7complete Date examplesAgentM 2c7f52aadd a mkRelation testAgentM 57e1596delete some dud data from Relation.hsAgentM d284af9100% rename test coverageAgentM c6898c3implement simple REPR for Tutorial D interpreterAgentM 89cf883cabalize projectAgentM bbf9221add simple projection test in Tutorial DAgentM 7555bfbimplement rename for Tutorial DAgentM 49ed722working Tutorial D parserAgentM ecc4793Initial commitAgentM