Fix PHPStan L1 errors "@covers value foo references an invalid class or function."

For the 2 remarks on the PR.

All my remarks have been addressed.
For me it is RTBC.

Rebased after 📌 Fix PHPStan L1 errors "@covers value \Foo\Bar::baz() references an invalid method." Fixed was committed.

Rebased after 📌 Fix PHPStan L1 errors "Annotation "@covers::foo" is invalid, "@covers" should be followed by a space and a value." Fixed was committed.

NOTE: There's still one open thread in the MR that might(?) need some more input before committing.

Addressed last open thread.

All the changes look good to me.
Back to RTBC.

Merge blocked: fast-forward merge is not possible. To merge this request, first rebase locally.

Thanks @daffie, back to RTBC after rebase.

longwave → credited xjm → .

Committed and pushed to 10.1.x, thanks!

Spokje → closed merge request !3749

Automatically closed - issue fixed for 2 weeks with no activity.