Underline paragraph formatting requirements

Sometimes, particularly for headings in some countries, a block of text will be underlined with a particular dot pattern. The underline generally is the width of the block of text and to the same alignment (e.g. left aligned if the text is left aligned, centered if the text is centered, etc).
Examples include dots 2-5 and 2-3-5-6

CSS bottom border (border-bottom) could be used to achieve the underlining, with the width set to fit-contents, see #65.
The actual braille character(s) used for the underlining need be specified as a braille character and this would be an extension to CSS.