HashSyntax autocorrect breaks return statements

[viraptor]

HashSyntax autocorrection results in a broken return syntax if the braces were not included.

---

Expected behavior

return :a => 1

should get autocorrected to:

return {a: 1}

Actual behavior

Gets corrected to:

return a: 1

Which gives:

SyntaxError ((irb):6: syntax error, unexpected ':', expecting keyword_end)

Steps to reproduce the problem

rubocop --only Style/HashSyntax -a ...

RuboCop version

Include the output of rubocop -V or bundle exec rubocop -V if using Bundler. Here's an example:

0.83.0 (using Parser 2.7.1.2, running on ruby 2.5.8 x86_64-darwin18)