Nested or Compact Class and Module naming style?

Hi, is there any specific style that you guys follow for class and module naming style, either nested or compact??
In the rubystyle guide they prefer nested due to surprising constant lookups

> Using the scope resolution operator can lead to surprising constant lookups due to Ruby’s [lexical scoping](https://cirw.in/blog/constant-lookup.html)
> ref: https://rubystyle.guide/#namespace-definition

example of nested:
```
class Foo
class Bar
end
end
```

example of compact:
```
class Foo::Bar
end
```