[ruby-core:119025] [Ruby master Feature#20712] module should return newly defined module

Issue #20712 has been updated by ufuk (Ufuk Kayserilioglu).


`module` and `class` don't return `nil`, they return the value of the last statement in the scope:
```ruby
x = module Foo
  42
end
puts x #=> 42

x = class Bar
  def foo = 42
end
puts x #=> :foo
```
There might be code that relies on this fact, so the proposal could be a backward compatibility concern.

On the other hand, if this were to change, since method definitions (i.e. `def`s) return the _name_ of the method defined and not the method object itself, I think it would make more sense for `module`/`class` to return the _name_ of the module/class being defined and not the module/class object itself.


----------------------------------------
Feature #20712: module should return newly defined module
https://bugs.ruby-lang.org/issues/20712#change-109602

* Author: esad (Esad Hajdarevic)
* Status: Open
----------------------------------------
Currently module keyword returns nil after defining a new module:

```
x = module Foo
end
# x is nil
```

It would be more consistent with `Module.new` if module keyword returned the newly defined module. Then we could do:

```
using(module Foo
  refine ...
end)
```

instead of

```
module Foo
end
using Foo
```



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