MultilineMethodCallBraceLayout with new_line style false positive

[maxjacobson]

I believe the following is a false positive offense in this cop when it's configured this way:

Expected behavior

My .rubocop.yml:

MultilineMethodCallBraceLayout:
  EnforcedStyle: new_line

My ruby:

feed(
  'dog food', [
    dog1,
    dog2
  ].join(' ')
)

Expect no offenses

Actual behavior

$ rubocop -D
Inspecting 1 file
C

Offenses:

indent.rb:5:13: C: Style/MultilineMethodCallBraceLayout: Closing method call brace must be on the line after the last argument.
  ].join(' ')
            ^

1 file inspected, 1 offense detected

Workaround

I can satisfy the cop by changing my ruby to this:

feed(
  'dog food', [
    dog1,
    dog2
  ].join(
    ' '
  )
)

But I don't think it should be necessary, because the join method call is not multiline

Steps to reproduce the problem

Using the above yaml and ruby code and running rubocop should reproduce the same behavior

RuboCop version

Include the output of rubocop -V:

$ rubocop -V
0.42.0 (using Parser 2.3.1.2, running on ruby 2.3.1 x86_64-darwin14)