AllCops:EnabledByDefault

[betesh]

Rubocop should have an EnabledByDefault option, just like there's a DisabledByDefault option.

If I want to Enable all cops, I need to read through all the docs to figure out which ones are disabled by default. It would be far more efficient if I could simply configure Rubocop to enable all of them.

Also, even if I've already enabled all cops that are disabled by default, if a new cop is added in a later version, I need to read through the Change Log to know about it.

[bbatsov]

Sounds like a reasonable idea to me.

[betesh]

Great, I'm working on a PR

[betesh]

@bbatsov Can you take a look at the failing test on the PR (#4014)? I think it's a bug in the existing code but I'm not sure.