Issue #17374 has been updated by shugo (Shugo Maeda).
It's intended behavior.
Refinements are activated either in scope where using is called or in blocks given to refine.
I don't recommend module inclusion to define refined methods.
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Bug #17374: Refined methods aren't visible from a refinement's module
https://bugs.ruby-lang.org/issues/17374#change-88986
* Author: marcandre (Marc-Andre Lafortune)
* Status: Open
* Priority: Normal
* Assignee: shugo (Shugo Maeda)
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
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