Having using TortoiseHG for 3+ years, I've never seen this in the console before, but within the last few days, I've seen this same pattern outputted to the console a couple of times while updating or pushing (not sure which). Anyone know what's going on?
What you're seeing is an Atlassian signature. Are you pushing to BitBucket or a hosted instance of Stash by any chance?
It's not indicative of a problem with your TortoiseHG instance. Just disregard it. Or if it really bothers you, complain to Atlassian directly.