Add logical/math operators to fix #739

[Add00]

What GitHub issue does this PR apply to?

Resolves #739

What changed and why?

I've added the full set of arithmetic, logical, and bit-wise operators for the Kotlin language.

Checklist

• I claimed any associated issue(s) and they are not someone else's
• I have looked at documentation to ensure I made any revisions correctly
• I tested my changes locally to ensure they work
• For language files, I have validated the edited files are valid JSON and data shows up correctly
• For website code edits, I have added or edited any appropriate unit tests for my changes

Any additional comments or things to be aware of while reviewing?

Kotlin docs were the primary source and instrumental in resolving this issue.

[Add00]

I didn't use docker to build the project, nor am I supper familiar with it. How should I best go about fixing the code to pass that test case?

[geekygirlsarah]

I didn't use docker to build the project, nor am I supper familiar with it. How should I best go about fixing the code to pass that test case?

One of the reasons it's not a required check is that occasionally the build of that fails due to a library that sometimes breaks when the build happens. Nothing has changed with Docker, so that's fine. I've merged other PRs despite that failing.

[geekygirlsarah]

The name doesn't technically show up, it's pulled in from the meta file. It'll still show up as a null-coalescing operator. You might want to clarify in the comment that's the case here (and also Kotlin calls it that)

[geekygirlsarah]

I can merge this in but don't know if you want to change the Elvis operator comment first. Let me know!

[Add00]

I changed the name to null coalescing and instead mentioned in the comment that it is also known as the Elvis operator

[geekygirlsarah]

You could have left it in there, just the name field is mostly for convenience of making the file here, not actually used.

[geekygirlsarah]

You did, I didn't finish looking.

But thakn you for contributing! I'll merge it in.

Happy Hacktoberfest!