Mistake in `List("foo", "bar", "quux").distinctBy(_.length) == List("foo", "bar")`. 
Right: List("foo", "bar", "quux").distinctBy(_.length) ==  List("foo", "quux")

replace `{ elements = x :: elements }` with `: Unit = \n elements = x :: elements` to remove `warning: procedure syntax is deprecated: instead, add `: Unit =` to explicitly declare `push`'s return type`

Scala 2.13 errors by default, so I don't think the style guide
needs to cover this any more

trying to more accurately reflect what I actually see in 1-Sep-2020 version of IntelliJ on Windows (no OK button, Object with capital O)

The instructions as written did not work for me today, so I edited them so they would have. Presumably IntelliJ has changed its behavior since they were written. Note also, they are still off: "To the right of the Scala SDK field, click the **Create** button." There is no such field or button at that point, I assume there was in older versions of IntelliJ. I don't know how best to fix that issue.

typo

as suggested by Alice Ravier at
https://users.scala-lang.org/t/bintray-with-sbt-addcompilerplugin/6784/5

In the example `printer: Printer[Cat]` parameter is substituted for a `Printer[Animal`,
not the other way around

It's easy to get confused by opposite meanings of "substitute for" and "substitute with":
https://en.wiktionary.org/wiki/substitute#Verb

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.10 to 1.11.5.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/nokogiri@v1.10.10...v1.11.5)

Signed-off-by: dependabot[bot] <support@github.com>