NodeFormatterNT is not escaping characters

Original message from the mailing-list:

http://mail-archives.apache.org/mod_mbox/incubator-jena-dev/201109.mbox/%3CCAJWYrb2ZAtDSsswF5jsKG6dhvNeYH2TrrUQRGCt27XoQLyNBhw@mail.gmail.com%3E

Copied answer given by Andy:

> Looks like there is a bug in BindingOutputStream - it's not escaping the
> " in the item being output.

So the operation is called "writeEscaped" in NodeFormatterNT ... except
it doesn't do any escaping. Doh! This is a regression due to the
better (in theory) node formatters.