Fix flake8 issues

youtube_dl/extractor/xnxx.py

@@ -102,7 +102,7 @@ class XNXXIE(InfoExtractor):
         uploader_data = re.findall(r'<a class=".+?-plate" href="(?P<uploader_url>.+?)">(?P<uploader_name>.+?)</a>', webpage)
         uploader_id = ''
         uploader_url = ''
-        if uploader_data!=[]:
+        if uploader_data != []:
             uploader_id = uploader_data[0][1]
             uploader_url = uploader_data[0][0]