space between buttons css

1<style>
2/* Added to highlight spacing */
3.is-grouped {   
4    display: inline-block;
5    background-color: yellow;
6}
7
8.is-grouped > .button:not(:last-child) {
9    margin-right: 10px;
10}
11</style>
12
13Spacing shown in yellow<br><br>
14
15<div class='is-grouped'>
16    <button class='button'>Save</button>
17    <button class='button'>Save As...</button>
18    <button class='button'>Delete</button>
19</div>

1.yourClass{margin-left:100px;}