-- //     [6] break ::= 0x0a | 0x0d | (0x0d 0x0a)

lineBreak = (choice $ map (try . string) ["\x0d\x0a","\x0a","\x0d"]) <?> "line break"
lineBreak = (choice $ map (try . string) ["\x0d\x0a","\x0a","\x0d"]) <?> "line break"
lineBreak = (choice $ map (try . string) ["\x0d\x0a","\x0a","\x0d"]) <?> "line break"