Fixed inline html comments parse

lib/common/html_re.js

@@ -41,7 +41,9 @@ var open_tag    = replace(/<[A-Za-z][A-Za-z0-9]*attribute*\s*\/?>/)
                     ();
 
 var close_tag   = /<\/[A-Za-z][A-Za-z0-9]*\s*>/;
-var comment     = /<!--([^-]+|[-][^-]+)*-->/;
+// 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 processing  = /<[?].*?[?]>/;
 var declaration = /<![A-Z]+\s+[^>]*>/;
 var cdata       = /<!\[CDATA\[([^\]]+|\][^\]]|\]\][^>])*\]\]>/;

lib/rules_inline/htmltag.js

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