fix(channelstream): fixed history writing

rhodecode/lib/channelstream.py

@@ -217,7 +217,7 b' def write_history(config, message):'
         json_message = json.dumps(message)
         with open(filepath, 'ab') as f:
             f.write(json_message)
-            f.write('\n')
+            f.write(b'\n')
     finally:
         LOCK.release_write_lock()