docgen/docgen.go:40:	Builtins  = map[Identifier]*Type{
docgen/docgen.go:103:	for builtin, t := range Builtins {
docgen/docgen.go:104:		c.Variables[builtin] = t
docgen/docgen_test.go:48:	Builtins = nil
docgen/docgen_test.go:217:	Builtins = nil
repl/repl.go:41:		AutoComplete: completer{append(builtin.Names, keywords...)},
