#1 XMLWriter should deal with surrogates in its UTF-16 input

[Joseph Walton]

If XMLWriter is given input that includes UTF-16
surrogate characters outside the BMP, it should decode
them so the correct numeric reference is included in
the output.

This test suite indicates cases to consider.

[Joseph Walton]

Test cases for UTF-16 surrogates.

[Joseph Walton]

Logged In: YES
user_id=847250

Patch to pass tests.

[Joseph Walton]

Patch to deal with surrogate characters.

[Joseph Walton]

Logged In: YES
user_id=847250

Missed a case:

// A valid character that caused a problem
public void testValidNonSurrogate() throws
SAXException, IOException
{
xw.dataElement("x", "\uFF09");
xw.endDocument();
xw.flush();

assertEquals("<x>&#65289;</x>",
sw.toString().trim());
}

Patch resubmitted to deal with this correctly.