IE6+ compatible rotation mixin using matrices

ie-compatible-rotation.less

.rotate-ie(@degrees) {
    -webkit-transform: rotate(@degrees);
    -o-transform: rotate(@degrees);
    transform: rotate(@degrees);

    @cos: cos(@degrees);
    @sin: sin(@degrees);

    @nl: `"\n"`; // Newline

    filter: ~"progid:DXImageTransform.Microsoft.Matrix(@{nl}    M11=@{cos},@{nl}    M12=-@{sin},@{nl}    M21=@{sin},@{nl}    M22=@{cos},@{nl}    sizingMethod='auto expand'@{nl}  )";
    -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(@{nl}    M11=@{cos},@{nl}    M12=-@{sin},@{nl}    M21=@{sin},@{nl}    M22=@{cos},@{nl}    sizingMethod='auto expand'@{nl}  )";
}