Fix broken layout of 'Change Endpoints' documentation

Change-Id: I8dde54358121767474c6ba97f879dc194352a38f
diff --git a/Documentation/rest-api-changes.txt b/Documentation/rest-api-changes.txt
index 0c30a4b..7b51567 100644
--- a/Documentation/rest-api-changes.txt
+++ b/Documentation/rest-api-changes.txt
@@ -306,6 +306,7 @@
 * `SKIP_MERGEABLE`: skip the `mergeable` field in
 link:#change-info[ChangeInfo]. For fast moving projects, this field must
 be recomputed often, which is slow for projects with big trees.
+--
 
 [[submittable]]
 --