Use the same regexp for comments as reference parser

lib/common/html_re.js

@@ -41,9 +41,7 @@ var open_tag    = replace(/<[A-Za-z][A-Za-z0-9\-]*attribute*\s*\/?>/)
                     ();
 
 var close_tag   = /<\/[A-Za-z][A-Za-z0-9\-]*\s*>/;
-// That's less strict than http://www.w3.org/TR/html5/syntax.html#comments
-// but we do the rest of check in "inline" rule.
-var comment     = /<!--[\s\S]*?-->/;
+var comment     = /<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->/;
 var processing  = /<[?].*?[?]>/;
 var declaration = /<![A-Z]+\s+[^>]*>/;
 var cdata       = /<!\[CDATA\[[\s\S]*?\]\]>/;

lib/rules_inline/html_inline.js

@@ -5,7 +5,6 @@
 
 var HTML_TAG_RE = require('../common/html_re').HTML_TAG_RE;
 
-var COMMENT_RE = /^<!--[\s\S]*?-->$/;
 
 function isLetter(ch) {
   /*eslint no-bitwise:0*/
@@ -15,7 +14,7 @@ function isLetter(ch) {
 
 
 module.exports = function html_inline(state, silent) {
-  var ch, match, max, content, pos = state.pos;
+  var ch, match, max, pos = state.pos;
 
   if (!state.md.options.html) { return false; }
 
@@ -38,17 +37,10 @@ module.exports = function html_inline(state, silent) {
   match = state.src.slice(pos).match(HTML_TAG_RE);
   if (!match) { return false; }
 
-  content = state.src.slice(pos, pos + match[0].length);
-
-  // Additional check for comments
-  if (COMMENT_RE.test(content)) {
-    if (/(^>|^->|--|-$)/.test(content.slice(4, -3))) { return false; }
-  }
-
   if (!silent) {
     state.push({
       type: 'html_inline',
-      content: content,
+      content: state.src.slice(pos, pos + match[0].length),
       level: state.level
     });
   }