diff --git a/config/refspec.go b/config/refspec.go
index 7f486c973..d32a2e40a 100644
--- a/config/refspec.go
+++ b/config/refspec.go
@@ -18,7 +18,7 @@ var (
 	ErrRefSpecMalformedWildcard  = errors.New("malformed refspec, mismatched number of wildcards")
 )
 
-// RefSpec is a mapping from local branches to remote references
+// RefSpec is a mapping from local branches to remote references.
 // The format of the refspec is an optional +, followed by <src>:<dst>, where
 // <src> is the pattern for references on the remote side and <dst> is where
 // those references will be written locally. The + tells Git to update the