I have no idea whether that's useful at all. I added intersperse to Data.Sequence because it has a really nice and efficient implementation in terms of the Applicative instance for Seq. I have no idea if anyone uses it.
I know applications for `intercalate :: Text -> [Text] -> Text`: `unwords`, `unlines`, etc. But what is `intersperse :: Char -> Text -> Text` good for? Am I correct assuming that its sole merit is to mimic `Data.List` API? Note that `Data.List.intersperse` is polymorphic and is exceedingly rarely used for `Char -> String -> String`.
Best regards,
Andrew
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