Add tests for auto-generated private accessors.

[autark]

No description provided.

[AlexDaniel]

I am half way through reviewing this PR. However, I don't understand why the test for RT #125227 is removed. Could you shine a light on that?

That being said, this removed test seems to be wrong. $o ~~ /':2'/ will probably match World.nqp:2498 just as well.

[autark]

These tests are written in support of PR rakudo/rakudo#674. That PR adds support for auto-generating private accessors, it also attaches defined semantics to 'is rw'/'is readonly' for private attributes. In that regard the test was removed as it specifically tests that 'is rw' will generate a warning -- something it should no longer do.

[JJ]

This issue mentions an issue that has been closed as Rejected, and also has a good amount of conflicts. Closing it.

[AlexDaniel]

What? This is a PR with tests for rakudo/rakudo#674 which is open. So this should be open as well.

[vrurg]

Worth a problem-solving issue, I'd say.