feature: add comment test

renderer/comment.py

@@ -1,7 +1,17 @@
+import re
+
 from mistletoe.block_token import BlockToken
+from mistletoe.span_token import SpanToken
 
 
-class Comment(BlockToken):
+class SpanComment(SpanToken):
+    """
+    Coment span token (% Eiersalat).
+    Identifies a comment in text.
+    """
+    pattern = re.compile(r'(%.*\n?)')
+
+class BlockComment(BlockToken):
     @staticmethod
     def start(line):
         return line.startswith("%")