#11375 fix extra whitespace on result file

Signed-off-by: Nayana Hettiarachchi <nayanah@gmail.com>

cmd/helm/testdata/output/template-with-invalid-yaml-debug.txt

@@ -11,7 +11,7 @@ spec:
     command: ["/bin/sleep","9000"]
 invalid
 Error: YAML parse error on chart-with-template-with-invalid-yaml/templates/alpine-pod.yaml contents:
- apiVersion: v1
+apiVersion: v1
 kind: Pod
 metadata:
   name: "release-name-my-alpine"