[moultano]

I'd say if the formatting changes the meaning of the language, Unicode should support it. So if you are searching through text, any change to your query string that you would like to constrain the text that matches should be supported by Unicode. Unicode should at least support anything that affects the semantic equality of strings.

[Bromskloss]

I'm thinking of Unicode as a character set, and that text exists on an abstraction level above characters.

[moultano]

I was thinking that it's analogous to ก็็็็็็็็็็็็็็็็็็็็ where the character dictates how the surrounding characters are rendered.