There are two bugs being fixed:

1.  The hueristic for whether a slice of byte looks like text
    should check whether a rune IsPrint OR IsSpace, and not both.
    Only a single rune (i.e., U+0020) ever satisfies both conditions.

    Previously, it would print as:
        MyBytes{0x68, 0x65, 0x6c, 0x6c, 0x6f}
    and now it would now print as:
        MyBytes(MyBytes("hello"))

2.  If we're printing as string, then we should set skipType=true
    since we already explicitly format the value with the type.

    Previously, it would print as:
        MyBytes(MyBytes("hello"))
    and now it would now print as:
        MyBytes("hello")