Horizontal list with commas

Ok, this is the solution, found this morning…

just specify a name of class in the shortcode and add this css code :

#liste-enligne {
border: 1px solid #000;
margin: 2em;
width: 80%;
padding: 5px;
font-family: Verdana, sans-serif;
}

#liste-enligne p {
display: inline;
}

#liste-enligne ul, #liste-enligne li {
display: inline;
margin: 0;
padding: 0;
color: #339;
font-weight: bold;
}

#liste-enligne ul li:after {
content: “, “;
}