Team-Sass/Singularity — pull request #139 by slbug (2013-10-23 22:04:53+00:00)
Title: Fix issue with gutters for not first and not last columns

Test css:

```scss
.content {
@include grid-span(12, 1);

@include from(3) {
@include layout(3 9) {
@include grid-span(1, 2);
}
}

@include from(4) {
@include layout(3 8 1) {
@include grid-span(2, 2);
}
}

.thumbnails {
$grids: 1;

@for $i from 2 through total-slices() {
$grids: add-grid($i at bp($i));
}

.photo {
text-align: center;

margin-bottom: 1em;

@for $slice from 2 through total-slices() {
@include at($slice) {
@for $column from 1 through $slice {
&:nth-child(#{$slice}n+#{$column}) {
@include grid-span(1, $column, $output_style: float);
}
}
}
}
}

}

}
```

Result before fix (items starting from 2nd one displayed without margin-right):
![before](https://f.cloud.github.com/assets/108694/1394789/f32cad24-3c2e-11e3-9337-7f67f1921e92.png)

After:

![after](https://f.cloud.github.com/assets/108694/1394794/0204d128-3c2f-11e3-902f-4dc2729f02ed.png)