default sorting by name is unexpected #6

The issue is here https://github.com/ziglang/zig/blob/8e72a25285b5e782ee44828b6d1904d91fb16a29/lib/std/ascii.zig#L422. orderIgnoreCase does not honor differences in length, so when sorting number suffixed files, the sorting won't be correct. For instance

        "e_1",
        "e_3",
        "e_2",
        "e_14",
        "e_13",
        "e_10",

should become

        "e_1",
        "e_2",
        "e_3",
        "e_10",
        "e_13",
        "e_14",