Fixed build errors

Author: prijip

rest_framework_docs/api_endpoint.py

@@ -3,10 +3,10 @@
 from django.contrib.admindocs.views import simplify_regex
 from django.utils.encoding import force_str
 from rest_framework.serializers import BaseSerializer
-
 from django.utils.safestring import mark_safe
 from docutils import core
 
+
 class ApiEndpoint(object):
 
     def __init__(self, pattern, parent_pattern=None, drf_router=None, docstring_format=None):
@@ -71,7 +71,7 @@ def __get_allowed_methods__(self):
 
     def __get_docstring__(self):
         description = inspect.getdoc(self.callback)
-        if (self.docstring_format == "rst"): # reStructuredText
+        if (self.docstring_format == "rst"):  # reStructuredText
             parts = core.publish_parts(source=description, writer_name="html")
             html = parts["body_pre_docinfo"] + parts["fragment"]
             description = mark_safe(html)