Fix the test output, now that escapes in repr() of string and Unicode

are different (Ping couldn't test this).

Lib/test/output/test_pyexpat

@@ -11,7 +11,7 @@ Notation declared: ('notation', None, 'notation.jpeg', None)
 Unparsed entity decl:
 	('unparsed_entity', None, 'entity.file', None, 'notation')
 Start element:
-	'root' {'attr1': 'value1', 'attr2': 'value2\341\275\200'}
+	'root' {'attr1': 'value1', 'attr2': 'value2\xe1\xbd\x80'}
 NS decl:
 	'myns' 'http://www.python.org/namespace'
 Start element:
@@ -41,7 +41,7 @@ Notation declared: (u'notation', None, u'notation.jpeg', None)
 Unparsed entity decl:
 	(u'unparsed_entity', None, u'entity.file', None, u'notation')
 Start element:
-	u'root' {u'attr1': u'value1', u'attr2': u'value2\u1F40'}
+	u'root' {u'attr1': u'value1', u'attr2': u'value2\u1f40'}
 NS decl:
 	u'myns' u'http://www.python.org/namespace'
 Start element:
@@ -71,7 +71,7 @@ Notation declared: (u'notation', None, u'notation.jpeg', None)
 Unparsed entity decl:
 	(u'unparsed_entity', None, u'entity.file', None, u'notation')
 Start element:
-	u'root' {u'attr1': u'value1', u'attr2': u'value2\u1F40'}
+	u'root' {u'attr1': u'value1', u'attr2': u'value2\u1f40'}
 NS decl:
 	u'myns' u'http://www.python.org/namespace'
 Start element: