Style/TernaryParentheses claims to correct, but does not

[donv]

Given a file with the following code:

class MyClass
  attr_accessor :start_at, :end_at
  def my_method
    (end_at == start_at) ? 1 : 2
  end
end

Running Rubocop with --auto-correct gives the following output:

Inspecting 1 file
C

Offenses:

ternary_parentheses.rb:4:5: C: [Corrected] Style/TernaryParentheses: Omit parentheses for ternary conditions.
    (end_at == start_at) ? 1 : 2
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1 file inspected, 1 offense detected, 1 offense corrected

---

Expected behavior

The parentheses should be removed.

Actual behavior

The parentheses are still present.

RuboCop version

Using master at 9ad80ca

$ rubocop -V
0.45.0 (using Parser 2.3.1.4, running on jruby 2.3.1 java)