Correct the output file name for exports.

cms/djangoapps/contentstore/tasks.py

@@ -630,9 +630,6 @@ def create_export_tarball(course_module, course_key, context, status=None):
     Updates the context with any error information if applicable.
     """
     name = course_module.url_name
-    if isinstance(name, binary_type):
-        name = name.decode('utf-8')
-
     export_file = NamedTemporaryFile(prefix=name + '.', suffix=".tar.gz")
     root_dir = path(mkdtemp())
 

cms/djangoapps/contentstore/views/import_export.py

@@ -277,7 +277,7 @@ def send_tarball(tarball, size):
     """
     wrapper = FileWrapper(tarball, settings.COURSE_EXPORT_DOWNLOAD_CHUNK_SIZE)
     response = StreamingHttpResponse(wrapper, content_type='application/x-tgz')
-    response['Content-Disposition'] = u'attachment; filename=%s' % os.path.basename(tarball.name.encode('utf-8'))
+    response['Content-Disposition'] = u'attachment; filename=%s' % os.path.basename(tarball.name)
     response['Content-Length'] = size
     return response