We know Google has an incredibly light weight ranking signal around going HTTPS with your site. Google has been pushing sites to go HTTPS as a matter of principle and "security."
That being said, Menashe Avramov noticed and posted on Google+ that Google's updated canonical URLs documentation now uses HTTPS in their URL examples, as opposed to HTTP.
Here is a picture:
Menashe Avramov actually documented and highlighted the before and after with these highlights in the embed below.
This doesn't really say much outside of Google still trying to communicate to webmasters to go HTTPS, as far as I can tell.
Forum discussion at Google+.
