don't reset the special-char blocks in parser_reset

since cmark_parser_reset is called in cmark_parser_finish, this state
would be inconsistent if you reused a parser with extensions multiple
times.

Author: QuietMisdreavus

src/blocks.c

@@ -142,16 +142,15 @@ static void cmark_parser_reset(cmark_parser *parser) {
   parser->syntax_extensions = saved_exts;
   parser->inline_syntax_extensions = saved_inline_exts;
   parser->options = saved_options;
-
-  cmark_set_default_skip_chars(&parser->skip_chars, false);
-  cmark_set_default_special_chars(&parser->special_chars, false);
 }
 
 cmark_parser *cmark_parser_new_with_mem(int options, cmark_mem *mem) {
   cmark_parser *parser = (cmark_parser *)mem->calloc(1, sizeof(cmark_parser));
   parser->mem = mem;
   parser->options = options;
   cmark_parser_reset(parser);
+  cmark_set_default_skip_chars(&parser->skip_chars, false);
+  cmark_set_default_special_chars(&parser->special_chars, false);
   return parser;
 }