http://www.haskell.org/haskellwiki/Typeclassopedia  under §8.1,

        sconcat = sconcat (a :| as) = go a as where

What is the meaning of :| ?
I see it is really in the cited module source, not a typo on the page.

More generally, is there some effective way to search for non-alphabetical Haskell things?  Google just ignores the "punctuation".

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