Fix PEP8 warnings for Nyaa.py

searx/engines/nyaa.py

         return int(num)
     return 0
 
+
 # get multiplier to convert torrent size to bytes
 def get_filesize_mul(suffix):
     return {
         'TIB': 1024 ** 4
     }[str(suffix).upper()]
 
+
 # do search-request
 def request(query, params):
     query = urlencode({'term': query})