Add Comment start dash state errors.

Author: inikulin

lib/tokenizer/index.js

@@ -1595,6 +1595,7 @@ _[COMMENT_START_DASH_STATE] = function commentStartDashState(cp) {
         this.state = COMMENT_END_STATE;
 
     else if (cp === $.GREATER_THAN_SIGN) {
+        this._err(ERR.abruptComment);
         this.state = DATA_STATE;
         this._emitCurrentToken();
     }