This is the same as the .write()
method in our Document class.
# - - - D o c u m e n t F r a g m e n t . w r i t e - - -
def write ( self, outFile=None ):
"""Prettyprint self in XML to outFile."""
if outFile is None:
outFile = sys.stdout
domlette.PrettyPrint ( self.node, outFile )