Fix RST reader for field lists items with body beginning after a new line

src/Text/Pandoc/Readers/RST.hs

@@ -152,7 +152,7 @@ rawFieldListItem indent = try $ do
   string indent
   char ':'
   name <- many1 $ alphaNum <|> spaceChar
-  string ": "
+  char ':'
   skipSpaces
   first <- manyTill anyChar newline
   rest <- option "" $ try $ do lookAhead (string indent >> spaceChar)

tests/rst-reader.rst

@@ -279,7 +279,8 @@ Field Lists
 :address:  61 Main St.
 :city:  *Nowhere*, MA,
     USA
-:phone: 123-4567
+:phone:
+  123-4567
 
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