Quote:
Originally Posted by fogice
Possible bug (or at least a difference of opinion?) with Smarten Punctuation:
If there are em dashes in the source, Smarten Punctuation adds a space before and after the em dash. This is considered incorrect in books.
Merriam Webster: A Guide to Em Dashes, En Dashes, and Hyphens
I have a book with a lot of em dashes, and adding spaces makes for strange text layout.
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That sounds like one of the common complaints about the typography when using kepubs. They handling of these sort of things isn't quite correct. It is only visible when the text is justified. Personally, I remove the justification from anywhere that it isn't important as I do not see it as needed. And to be clear, this is not a problem with the driver, it is a problem with the renderer.
Also, the formatting around dashes is nowhere near as simple as that quote makes it out. It also varies with countries which includes which dash to use. In the end, it comes down to personal preferences of whoever created the book.