Update the xml and htmlparser examples to work on Python 2.

Some simple checks for the behaviour of the modules under Python
2 compared to Python 3.

examples/htmlparser/fuzz.py

@@ -1,4 +1,8 @@
-from html.parser import HTMLParser
+try:
+    from html.parser import HTMLParser
+except ImportError:
+    from HTMLParser import HTMLParser
+
 from pythonfuzz.main import PythonFuzz
 
 

examples/xml/fuzz.py

@@ -1,12 +1,19 @@
 import xml.etree.ElementTree as ET
 from xml.etree.ElementTree import ParseError
+import sys
+
 from pythonfuzz.main import PythonFuzz
 
 
 @PythonFuzz
 def fuzz(buf):
     try:
-        string = buf.decode("utf-8")
+        # In Python 2, the ElementTree only consumes bytes, not unicode strings,
+        # so we need to supply the correct format depending on the python version.
+        if sys.version_info[0] == 2:
+            string = bytes(buf)
+        else:
+            string = buf.decode("utf-8")
         ET.fromstring(string)
     except (UnicodeDecodeError, ParseError):
         pass