Markdown renderers find it easier to determine
where lists start and end when lists are surrounded
by new lines.
For consistency, also ensure entries in the list
are aligned when they span multipls lines.
Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/27070
Deprecate "chat commands" in favor of "slash commands"
We looked for things like:
- `slash commmand`
- `slash_command`
- `slash-command`
- `SlashCommand`
