Turn single line code into blocks to improve documentation readability

What does this MR do?

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/62506.

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• [-] Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content