comments css

I got this warning on the css code.
Acording to
http://www.w3schools.com/css/css_syntax.asp
Please use /* */

diff –git a/d3chart.css b/d3chart.css
index 775c59d..686b8cf 100644
— a/d3chart.css
+++ b/d3chart.css
@@ -110,7 +110,7 @@

/* Tooltip definitions */
.ISO-3166-1 {
– //color: transparent;
+ /* color: transparent; */
font-size: 1.0em;
}

@@ -121,7 +121,7 @@ div.iputooltip {
color: Black;
position: absolute;
padding: 5px 10px 5px 10px;
– background: #ffffcc; // #faf8ba;
+ background: #ffffcc; /* #faf8ba;*/
border-radius: 8px;
box-shadow: 4px 4px 2px gray;
}

http://wordpress.org/extend/plugins/d3-simplecharts/