[Haskell-beginners] Parsec chapter in realworldhaskell (ch.16)

[Obscaenvs]

In http://book.realworldhaskell.org/read/using-parsec.html , under the 
heading "Extended example: Full CSV Parser", there is in the function 
quotedChar an occurrence of the operator <|> with a try after it (i.e. 
to the right) . Now, in this chapter it says a little before that "|try| 
only has an effect if it is on the left of a |<|>|.". So in this 
particular case, try has no effect, or?

The offending code: <code>quotedChar = noneOf "\"" <|> try (string 
"\"\"" >> return '"')</code>

Help much appreciated, if not absolutely vital :)

/Fredrik
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