Use a better clear console sequence

[gaearon]

Found this in jestjs/jest#2230.

I tried many different options before but this one seems to work most consistently and removes the annoying scrollback both on OS X and Windows.

[gaearon]

I want to get this merged together with the Jest release that includes jestjs/jest#2230.

[ColCh]

May I ask - it works for windows 10 powershell, right?

[gaearon]

In my testing yes.

[dbachrach]

I'll add that this fixes an issue I've seen in my os x terminal: after running an npm start, opening a new terminal window brings me to my home directory instead of the working directory of my project. I hadn't quite tracked it down yet, since I couldn't repro it on a coworker's machine. Thanks 👍

[ColCh]

@dbachrach hm.. that change is related only for screen clearing things really.

You may changed this option under terminal settings:
(Sorry for Russian at screenshot - it's Terminal app options, Common tab, setting name is "Open in new tabs" and setting value is "open same working dir")

[gaearon]

Going to get this in, I'll remember to update Jest before releasing this.

[aripollak]

I'm confused about this - is it intentional to clear the entire scrollback history, even in tmux? It's super surprising for new users, and seems to assume that you'd never again want to see what was in the terminal history before running start or test.