A bug: commas inside atRules between curly brackets.

Hi Eduardo.

Check the example:
`@media (min-width: 62em) {
.hero__inner {
min-height: 550px
}
,.hero__txt {
max-width: 40%
}
,.hero__img {
max-width: 100%
}
}`

I think it happens so when joining the same media rules - with the same value (I have them separated in various places).