Fix Style/HashAsLastArrayItem with no_braces for empty hash

[fsateler]

When EnforcedStyle is set to no_braces, rubocop was attempting to
correct [1, {}] into [1, ], which is not valid. An empty hash cannot
omit the braces.

---

Before submitting the PR make sure the following are checked:

• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Added an entry to the Changelog if the new code introduces user-observable changes. See changelog entry format.
• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• Run bundle exec rake default. It executes all tests and RuboCop for itself, and generates the documentation.

[bbatsov]

The change looks good, but for some reason the CI is failing.

[fsateler]

I don't understand how the failures can be related to the PR...

[koic]

I don't understand how the failures can be related to the PR...

The following spec is failing.

Failures:

  1) RuboCop Project changelog has link definitions for all implicit links
     Failure/Error:
       expect(changelog.include?("[#{name}]: http"))
         .to be(true), "CHANGELOG.md is missing a link for #{name}. " \
                       'Please add this link to the bottom of the file.'

       CHANGELOG.md is missing a link for @fsateler. Please add this link to the bottom of the file.
     # ./spec/project_spec.rb:125:in `block (4 levels) in <top (required)>'
     # ./spec/project_spec.rb:124:in `each'
     # ./spec/project_spec.rb:124:in `block (3 levels) in <top (required)>'
     # tasks/spec_runner.rake:32:in `block in run_specs'
     # tasks/spec_runner.rake:44:in `with_encoding'
     # tasks/spec_runner.rake:28:in `run_specs'
     # tasks/spec_runner.rake:116:in `block in <top (required)>'

Finished in 2 minutes 29.1 seconds (files took 3.26 seconds to load)
13875 examples, 1 failure, 10 pending

https://github.com/rubocop-hq/rubocop/pull/8681/checks?check_run_id=1111352141#step:6:158

Can you add your account to the bottom of CHANGELOG.md?

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5936a4678..01b0bb8d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4856,3 +4856,4 @@
 [@jaimerave]: https://github.com/jaimerave
 [@Skipants]: https://github.com/Skipants
 [@sascha-wolf]: https://github.com/sascha-wolf
+[@fsateler]: https://github.com/fsateler

https://github.com/rubocop-hq/rubocop/blob/v0.90.0/CONTRIBUTING.md#changelog-entry-format