Merge is not suggested

[asafm7]

Why Merge is not sugested here?

MergeableSelector is enabled.

    .filter
    {
        background-color: #000;
    }

    .filter
    {
        ul
        {
            border-bottom: 0;
        }

        li
        {
            border-bottom: 1px solid #5a00ff;

            a:hover,
            a.active
            {
                border-bottom: 3px solid #5a00ff;
                background-color: transparent;
            }
        }
    }

[Arcanemagus]

You should file this over on scss-lint, this project is merely a wrapper around that allowing its results to be displayed in Atom.