Invalid offense/autocorrect for Style/RedundantLineContinuation

[pjg]

Expected behavior

Not to flag the Style/RedundantLineContinuation offense.

Actual behavior

Offense is flagged and incorrectly autocorrected.

Steps to reproduce the problem

Input:

expect(cart).to include \
  plan: 'plan',
  coupon: nil,
  item: nil

This is flagged as:

Style/RedundantLineContinuation: Redundant line continuation.
        expect(cart).to include \ ...

Output after autocorrecting:

expect(cart).to include
  plan: 'plan',
  coupon: nil,
  item: nil

Which is no longer valid Ruby code.

RuboCop version

$ [bundle exec] rubocop -V
1.61.0 (using Parser 3.3.0.5, rubocop-ast 1.30.0, running on ruby 3.1.4) [arm64-darwin22]
  - rubocop-factory_bot 2.25.1
  - rubocop-performance 1.20.2
  - rubocop-rails 2.23.1
  - rubocop-rspec 2.26.1

[bquorning]

cc @koic, it’s probably related to #12678.