CSS to add commas to items in an unordered list without leaving a comma hanging at the end of the list

gistfile1.css

ul.tags {
display: inline;
margin: 0;
padding: 0;
}

ul.tags li {
display: inline;
list-style: none;
margin: 0;
padding: 0;
}

ul.tags li:after {
content: ", ";
color: #aaa;
}

ul.tags li:last-child:after {
content: "";
}

I had no idea people were commenting on this! I'm so glad this helped you all! <3

Or even like this:

ul.tags li:not(:first-child):not(:last-child):after {
  content: ", ";
  color: #aaa;
}