Escape only what is necessary

Author: facelessuser

markdown/htmlparser.py

@@ -256,10 +256,9 @@ def handle_entityref(self, name: str):
 
     def handle_comment(self, data: str):
         # Check if the comment is unclosed, if so, we need to override position
-        # update
         i = self.line_offset + self.offset + len(data) + 4
         if self.rawdata[i:i + 3] != '-->':
-            self.handle_data('<!--')
+            self.handle_data('<')
             self.override_comment_update = True
             return
         self.handle_empty_tag('<!--{}-->'.format(data), is_block=True)
@@ -268,7 +267,7 @@ def updatepos(self, i: int, j: int) -> int:
         if self.override_comment_update:
             self.override_comment_update = False
             i = 0
-            j = 4
+            j = 1
         return super().updatepos(i, j)
 
     def handle_decl(self, data: str):