False positive on Style/CommentedKeyword inside class_eval

[woodruffw]

I'm getting a false positive from the Style/CommentedKeyword cop in one of my codebases. It looks like RuboCop gets confused by the combination of a class_eval and a %[] string. Details below.

---

Expected behavior

No Style/CommentedKeyword warning.

Actual behavior

lib/kbsecret/record/abstract.rb:55:17: C: Style/CommentedKeyword: Do not place comments on the same line as the def keyword.
            def #{field}
                ^^^^^^^^

Steps to reproduce the problem

This is the most minimal example I could come up with:

class_eval %[
  def #{field}
    "foo"
  end
]

The actual offending code in my own codebase is here: https://github.com/kbsecret/kbsecret/blob/master/lib/kbsecret/record/abstract.rb#L53

RuboCop version

Include the output of rubocop -V. Here's an example:

$ rubocop -V
0.51.0 (using Parser 2.4.0.0, running on ruby 2.4.2 x86_64-linux-gnu)

[pocke]

duplicated. #4886
And this problem will be fixed by #4944