Example snippet on landing page has incorrect whitespace

I believe this was an issue with dotnet, which I fixed with this PR: https://github.com/GoogleCloudPlatform/google-cloud-dotnet/pull/279/files

Issue is visible here: https://googlecloudplatform.github.io/gcloud-python/#/

Compare to here: https://googlecloudplatform.github.io/google-cloud-node/#/
