Going by the comments so far, I had to double check the heading of the article. 

Anyway it's nice to read this “I feel confident in what he’ll do, that’s all I can say to you about that,” Sessions said. “The man has a good reputation. He knows his business.”

The whole thing reads as "being reasonable" which is a nice change considering what else gets bandied about.
If he believes Mueller will be doing a good job, he knows that Mueller will look at everything.  The "...come to an end sooner rather than later." is probably for Trump's benefit. LOL