Render emphasis, subscripts, and superscripts as semantic HTML - #569
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While adapting The Racket Guide to EPUB 3 for myself locally (reading using Apple Books), I noticed that Scribble renders
@emph,@superscript, and@subscriptas styled<span>elements.Render them as
<em>,<sup>, and<sub>. Keepclass="emph"and the current subscript and superscript presentation. Addline-height: inheritto preserve the existing line-box behavior. Explicitalt-tagvalues, links, and custom string styles retain their current behavior.This follows PR #220, which made
@emphlogical and nestable. Its discussion proposed<em>output and identified the HTML renderer as the implementation point. That PR already added Markdown support.