Only display filenames that need formatting

Change-Id: I603801749b5a992099d92f07d34aa4fddd6e4b3f
diff --git a/jenkins/gerrit-verifier.yaml b/jenkins/gerrit-verifier.yaml
index 9fe0395..a079416 100644
--- a/jenkins/gerrit-verifier.yaml
+++ b/jenkins/gerrit-verifier.yaml
@@ -162,7 +162,7 @@
          #!/bin/bash -xe
          cd gerrit
          echo 'Running google-java-format check...'
-         git show --diff-filter=AM --name-only --pretty="" HEAD | grep java$ | xargs -r ~/format/google-java-format-1.5 --set-exit-if-changed
+         git show --diff-filter=AM --name-only --pretty="" HEAD | grep java$ | xargs -r ~/format/google-java-format-1.5 -n --set-exit-if-changed
       - shell: |
          #!/bin/bash -xe
          cd gerrit