Oh my gosh, I almost forgot about Unicode tricks! (I wish I knew more about
Unicode). Here is a macron: ā. And it seems there's a lot more you can do:
These will work just fine inside a Racket source file.
Something things in scribble have a `#:style` argument. And most things in
scribble can be contained inside a `nested` or `elem`, to which you could
apply your custom #:style. You can use this as a hook to a custom CSS file,
where you could maybe use "text-decoration: overline;" if that looks
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