app/assets/stylesheets/font-awesome/_font.scss
@font-face {
font: {
family: 'FontAwesome';
weight: normal;
style: normal;
}
src: font-url('fontawesome-webfont.eot');
src: font-url('fontawesome-webfont.eot?#iefix') format('eot'),
font-url('fontawesome-webfont.woff') format('woff'),
font-url('fontawesome-webfont.ttf') format('truetype'),
font-url('fontawesome-webfont.svg#FontAwesome') format('svg');
}