Fix #66: some fmt issues in old migrations

There does not seem to be more issues when running go test ./...

Author: hsanjuan

ipfs-1-to-2/go-migrate/cli.go

@@ -29,10 +29,10 @@ func Run(m Migration) error {
 
 	if !m.Reversible() {
 		if f.Revert {
-			return fmt.Errorf("migration %d is irreversible", m.Versions())
+			return fmt.Errorf("migration %s is irreversible", m.Versions())
 		}
 		if !f.Force {
-			return fmt.Errorf("migration %d is irreversible (use -f to proceed)", m.Versions())
+			return fmt.Errorf("migration %s is irreversible (use -f to proceed)", m.Versions())
 		}
 	}
 

ipfs-2-to-3/migration/migration.go

@@ -335,7 +335,7 @@ func loadOldKeys(from dstore.Datastore, k dstore.Key) ([]u.Key, error) {
 
 	vb, ok := v.([]byte)
 	if !ok {
-		return nil, fmt.Errorf("pinset %s was not stored as []byte")
+		return nil, fmt.Errorf("pinset %s was not stored as []byte", v)
 	}
 
 	var keys []u.Key