::note's have some formatting issues

[jgeewax]

Looks like the "Note" section in the docs have two issues:

1. "Note" isn't bolded (could argue that this is working-as-intended)
2. The note body doesn't have the correct padding

Screenshot:

Which came from http://googlecloudplatform.github.io/gcloud-python/storage-blobs.html#gcloud.storage.blob.Blob.upload_from_file