the range of valid Unicode code points are converted to <code>"\uFFFD"</code>.

<pre>
string('a')       // "a"
string(-1)        // "\ufffd" == "\xef\xbf\xbd"
string(0xf8)      // "\u00f8" == "ø" == "\xc3\xb8"
type MyString string
MyString(0x65e5)  // "\u65e5" == "日" == "\xe6\x97\xa5"
</pre>
</li>

<li>
Converting a slice of bytes to a string type yields