ampersand right after selector

[yaninataran]

The LESS code

.btn {
    a& {
        text-decoration: none;
    }
}

is converted to

btn {
    a & {
        text-decoration: none;
    }
}

but expected something like this (see the long history of this issue here sass/sass#1425 )

mixin btn {
    @at-root a#{&} {
        text-decoration: none;
    }
}