Prettify all of common test output.

[ferd]

This uses cth_readable to:

• silence error_logger output to the shell unless a test fails
• silence ct:pal output to the shell unless a test fails

I have currently not baked in any way to disable this behaviour, but I
figured if it is required, there is time to do it before the final
3.0.0 release.

What it looks like

[tsloughter]

Cool, +1 if I read this correctly and you do plan to add a way to switch it off before we go 3.0.0.

[ferd]

Yeah. It's just that I want us to cut the last beta soon and get this through for it. I have a few shell bugs to tackle in the upcoming days too.

[ferd]

That being said, what format should the switch take? {ct_prettify, false}, {ct_readable, false} or something else?

[tsloughter]

Yea, probably {ct_readable, false} so it is nearly the same name as the app.

I'd also like to include eunit formatters. I can quickly add that and make a PR if you agree that would be good to include in a similar fashion to this.

[ferd]

Yeah that could be good to have too.

[tsloughter]

Should add the app to rebar.app.src applications

[ferd]

@tsloughter done with the switch
@talentdeficit interested in your review of this.

[talentdeficit]

+1

i like the idiom you used for ensuring things were only present in a list once, i'll have to remember that

[ferd]

Well if the entry was there twice, it will be there twice again. It actually ensures they are there once or as many times as they were before. But yeah, it's nifty.