fix typos

Signed-off-by: allencloud <allen.sun@daocloud.io>
Upstream-commit: c1be45fa38e82054dcad606d71446a662524f2d5
Component: engine

components/engine/reference/reference.go

@@ -155,7 +155,7 @@ func IsNameOnly(ref Named) bool {
 	return true
 }
 
-// ParseIDOrReference parses string for a image ID or a reference. ID can be
+// ParseIDOrReference parses string for an image ID or a reference. ID can be
 // without a default prefix.
 func ParseIDOrReference(idOrRef string) (digest.Digest, Named, error) {
 	if err := v1.ValidateID(idOrRef); err == nil {