Link tect can be empty; inline code cannot be empty and can have nested

backticks; created a unit parser for all characters except newline

src/MdToHTML.hs

@@ -185,15 +185,16 @@ parseStrikethrough = do
 -- Parse code
 parseCode :: Parser MdToken
 parseCode = do
-  char '`'
-  inside <- manyTill (satisfy (/= '\n')) (char '`')
+  opening <- some $ char '`'
+  inside <- someTill (satisfy (/= '\n')) (char '`')
+  closing <- count (length opening - 1) (char '`')
   return (Code (Unit (concatMap escapeChar inside)))
 
 -- Parse a link
 parseLink :: Parser MdToken
 parseLink = do
   char '['
-  linkText <- someTill parseLineToken (char ']')
+  linkText <- manyTill parseLineToken (char ']')
   char '('
   linkURL <- manyTill anySingle (char ')')
   return $ Link (Line linkText) (URL linkURL)
@@ -259,6 +260,13 @@ parseUnit = do
   text <- anySingle
   return (Unit [text])
 
+-- Parse any character except a newline
+parseUnitExceptNewline :: Parser MdToken
+parseUnitExceptNewline = do
+  -- text <- satisfy (`notElem` specialChars)
+  text <- satisfy (/= '\n')
+  return (Unit [text])
+
 lineParsers :: [Parser MdToken]
 lineParsers =
   [ parseLinebreak,