This is a tiny bit complex to digest, could you split this up into two statements, e.g.:

```D
string res = 2.predSwitch!"a < b"(
    1, "less then 1",
    5, "less then 5",
    10, "less then 10");

assert(res == "greater or equal to 10");
```

Also you can remove this example section and make the unittest comment a doc comment, via:

```D
///
unittest
{
    string res = 2.predSwitch!"a < b"(
        1, "less then 1",
        5, "less then 5",
        10, "less then 10");

    assert(res == "greater or equal to 10");
}
```

This will inject the body into an Example section (this is a recently introduced feature).