Handle case when we don't have to turn body into a bytestring.

lti_consumer/outcomes.py

@@ -43,6 +43,7 @@ def parse_grade_xml_body(body):
     """
     lti_spec_namespace = "http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0"
     namespaces = {'def': lti_spec_namespace}
+    data = body.strip()
     if isinstance(body, text_type):
         data = body.strip().encode('utf-8')
 

setup.py

@@ -25,7 +25,7 @@ def package_data(pkg, roots):
 
 setup(
     name='lti_consumer-xblock',
-    version='1.2.2',
+    version='1.2.3',
     description='This XBlock implements the consumer side of the LTI specification.',
     packages=[
         'lti_consumer',