Some more minor fixes: Typos, Formatting, broken code block, logic

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.2+
| Fixed tickets | -

Some more minor fixes.

I found that some YAML code block were broken (no line numbers; no highlighting) and all of them contained a line with `arguments: [@MyService]`. As all the other blocks are using `arguments: ["@MyService"]` (with double quotes) I hope this PR fixes this issue.