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Use isNothing.

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John MacFarlane
2017-06-01 14:16:17 +02:00
parent 00d8585d8f
commit c2eb7d0857
1 changed files with 2 additions and 2 deletions
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src/Text/Pandoc/App.hs
+2 -2
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@@ -413,8 +413,8 @@ convertWithOpts opts = do
mconcat <$> mapM (readFile' >=> r readerOpts) sources
metadata <- if format == "jats" &&
lookup "csl" (optMetadata opts) == Nothing &&
lookup "citation-style" (optMetadata opts) == Nothing
isNothing (lookup "csl" (optMetadata opts)) &&
isNothing (lookup "citation-style" (optMetadata opts))
then do
jatsCSL <- readDataFile datadir "jats.csl"
let jatsEncoded = makeDataURI ("application/xml", jatsCSL)