Do not truncate a legal attribute value when trying to ignore '/' in a short-hand-tag. b=125647, r=heikki, sr=jst, a=scc

htmlparser/src/nsHTMLTokens.cpp

@@ -1469,7 +1469,7 @@ void CAttributeToken::SanitizeKey() {
     // legal part
     if (iter != --end) {
       nsAutoString str;
-      CopyUnicodeTo(begin, iter, str);
+      CopyUnicodeTo(begin, ++iter, str);
       mTextKey.Rebind(str);
     }
   }

parser/htmlparser/src/nsHTMLTokens.cpp

@@ -1469,7 +1469,7 @@ void CAttributeToken::SanitizeKey() {
     // legal part
     if (iter != --end) {
       nsAutoString str;
-      CopyUnicodeTo(begin, iter, str);
+      CopyUnicodeTo(begin, ++iter, str);
       mTextKey.Rebind(str);
     }
   }