Style/AutoResourceCleanup shouldn't flag File.open(…).close.

[reitermarkus]

The Style/AutoResourceCleanup cop should not flag the following (touch + chmod):

File.open('file', 'w', 0o777).close

---

Expected behavior

Given a file with the content above, rubocop --only Style/AutoResourceCleanup should output:

Inspecting 1 file
.

1 file inspected, no offenses detected

Actual behavior

Given a file with the content above, rubocop --only Style/AutoResourceCleanup outputs:

Inspecting 1 file
C

Offenses:

open.rb:1:1: C: Use the block version of File.open.
File.open(file, 'w', 0o100777).close
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1 file inspected, 1 offense detected

RuboCop version

$ rubocop -V
0.49.1 (using Parser 2.4.0.0, running on ruby 2.0.0 universal.x86_64-darwin16)