[fix] pep8

searx/engines/wolframalpha_noapi.py

 
 # search-url
 url = 'http://www.wolframalpha.com/'
-search_url = url+'input/?{query}'
+search_url = url + 'input/?{query}'
 
 # xpath variables
 scripts_xpath = '//script'
 
     if line:
         # extract answer from json
-        answer = line[line.find('{'):line.rfind('}')+1]
+        answer = line[line.find('{'):line.rfind('}') + 1]
         try:
             answer = loads(answer)
         except Exception: