Refactor tests to use template literals instead of .join() syntax

[jseminck]

I recently wrote a small codemod to transform the eslint tests from using the code: ['','',''].join('\n') syntax to use the template literal syntax instead.

The code is available at: https://astexplorer.net/#/gist/000b6e8110a245ca6384c260b954e452/1687ee893085fdae7119c809294e5ed43a3fe428

All tests of this project were able to translate quite nicely. I'm not sure if you want this change but IMHO it makes working with tests much much easier. 😄

There's 1 comment that I had to re-add, please check if it's in the right location.

[coveralls]

Coverage remained the same at 71.91% when pulling 87ad8a2 on jseminck:tests-with-literals into 62d035a on Intellicode:master.

[coveralls]

Coverage remained the same at 71.91% when pulling 87ad8a2 on jseminck:tests-with-literals into 62d035a on Intellicode:master.

[Intellicode]

Nice, that cleans up tests nicely :)