diff --git a/attr.go b/attr.go
index e73f303af..34d14a280 100644
--- a/attr.go
+++ b/attr.go
@@ -233,44 +233,19 @@ type memAttrStore struct {
 	store map[uint64]map[string]interface{}
 }
 
-// Path is an in-memory implementation of AttrStore Path method.
-func (s *memAttrStore) Path() string { return "" }
-
-// Open is an in-memory implementation of AttrStore Open method.
-func (s *memAttrStore) Open() error {
-	return nil
-}
-
-// Close is an in-memory implementation of AttrStore Close method.
-func (s *memAttrStore) Close() error {
-	return nil
-}
-
-// Attrs returns a set of attributes by ID.
-func (s *memAttrStore) Attrs(id uint64) (m map[string]interface{}, err error) {
-	return s.store[id], nil
-}
-
-// SetAttrs sets attribute values for a given ID.
+func (s *memAttrStore) Path() string                                          { return "" }
+func (s *memAttrStore) Open() error                                           { return nil }
+func (s *memAttrStore) Close() error                                          { return nil }
+func (s *memAttrStore) Attrs(id uint64) (m map[string]interface{}, err error) { return s.store[id], nil }
 func (s *memAttrStore) SetAttrs(id uint64, m map[string]interface{}) error {
 	s.store[id] = m
 	return nil
 }
-
-// SetBulkAttrs sets attribute values for a set of ids.
 func (s *memAttrStore) SetBulkAttrs(m map[uint64]map[string]interface{}) error {
 	for id, v := range m {
 		s.store[id] = v
 	}
 	return nil
 }
-
-// Blocks is an in-memory implementation of AttrStore Blocks method.
-func (s *memAttrStore) Blocks() ([]AttrBlock, error) {
-	return nil, nil
-}
-
-// BlockData is an in-memory implementation of AttrStore BlockData method.
-func (s *memAttrStore) BlockData(i uint64) (map[uint64]map[string]interface{}, error) {
-	return nil, nil
-}
+func (s *memAttrStore) Blocks() ([]AttrBlock, error)                                  { return nil, nil }
+func (s *memAttrStore) BlockData(i uint64) (map[uint64]map[string]interface{}, error) { return nil, nil }