List of roles,
- underline: Applies an underline decoration to the span of text.
- overline: Applies an overline decoration to the span of text.
- line-through: Applies a line-through (aka strikethrough) decoration to the span of text.
- nobreak: Disables words within the span of text from being broken.
- nowrap: Prevents the span of text from wrapping at all.
- pre-wrap: Prevents sequences of space and space-like characters from being collapsed (i.e., all spaces are preserved).
Reference: https://docs.asciidoctor.org/asciidoc/latest/text/text-span-built-in-roles/