FB2 writer: fix order of items in title-info

Address issue #2424

src/Text/Pandoc/Writers/FB2.hs

@@ -135,7 +135,7 @@ description meta' = do
                     Just (MetaString s) -> coverimage s
                     _       -> return []
   return $ el "description"
-    [ el "title-info" (genre : (bt ++ annotation ++ as ++ dd ++ lang))
+    [ el "title-info" (genre : (as ++ bt ++ annotation ++ dd ++ lang))
     , el "document-info" (el "program-used" "pandoc" : coverpage)
     ]
 

test/writer.fb2

@@ -3,7 +3,6 @@
 <description>
 <title-info>
 <genre>unrecognised</genre>
-<book-title>Pandoc Test Suite</book-title>
 <author>
 <first-name>John</first-name>
 <last-name>MacFarlane</last-name>
@@ -11,6 +10,7 @@
 <author>
 <nickname>Anonymous</nickname>
 </author>
+<book-title>Pandoc Test Suite</book-title>
 <date>July 17, 2006</date>
 </title-info>
 <document-info>