Test: Trimmed trailing whitespace to make valid YAML

rest-api-spec/test/update/25_script_upsert.yaml

@@ -55,6 +55,6 @@
           type:   test
           id:     2
 
-  - match:  { _source.foo: xxx }  
-
+  - match:  { _source.foo: xxx }
 
+