e.b.olson

I was attempting to tackle this one for Hacktoberfest 2022. Turns out to be a tricky situation. I do have a potential fix, but the fix causes a `flake8` failure...

Unfortunately, as far as I can tell, _any_ trailing whitespace will cause a failure in the [`flake8` checks](https://www.flake8rules.com/rules/W291.html). I'm not very familiar with `flake8`, so it might be worth investigating...

Oh. Wow. I intended this as just a draft PR (hadn't had time to finish the notes and do all the checks). Thanks for moving this along. I can take...

Finally had some time to get back to this. Apologies for the delay. I've added some include-what-you-use pragmas to the code to prevent inclusion of ``. Not particularly pretty or...

> Looks like `avogadro/core/elements.cpp` still has an `` .. maybe that also goes on the list of "transform after `iwyu`" It does? Sorry, I'm not seeing that. I'm fairly new...