Merge pull request #563 from erizocosmico/perf/dotgit-ref-cache

dotgit: rewrite the way references are looked up
diff --git a/plumbing/object/commit.go b/plumbing/object/commit.go
index c5a1867..eee015b 100644
--- a/plumbing/object/commit.go
+++ b/plumbing/object/commit.go
@@ -278,7 +278,7 @@
 
 // ForEach call the cb function for each commit contained on this iter until
 // an error appends or the end of the iter is reached. If ErrStop is sent
-// the iteration is stop but no error is returned. The iterator is closed.
+// the iteration is stopped but no error is returned. The iterator is closed.
 func (iter *storerCommitIter) ForEach(cb func(*Commit) error) error {
 	return iter.EncodedObjectIter.ForEach(func(obj plumbing.EncodedObject) error {
 		c, err := DecodeCommit(iter.s, obj)