better printing

patterns.go

@@ -84,16 +84,14 @@ func (ptrn *pattern) String() string {
 		sub = append(sub, a.String())
 	}
 
-	var delim string
 	switch ptrn.Op {
 	case AND:
-		delim = ","
+		return strings.Join(sub, "/")
 	case OR:
-		delim = "|"
+		return "{" + strings.Join(sub, "|") + "}"
 	default:
 		panic("unrecognized pattern op!")
 	}
-	return "{ " + strings.Join(sub, delim) + " }"
 }
 
 type Base int

patterns_test.go

@@ -7,6 +7,7 @@ import (
 )
 
 func assertMatches(t *testing.T, p Pattern, args ...[]string) {
+	t.Logf("testing assertions for %q", p)
 	for _, argset := range args {
 		for _, s := range argset {
 			addr, err := ma.NewMultiaddr(s)