Merge pull request #1093 from Zeph33/fix/#1088

[fix] autocompleter py3 compatibility - fixes #1088

searx/query.py

         self.query_parts = []
 
         # split query, including whitespaces
-        raw_query_parts = re.split(r'(\s+)', self.query)
+        raw_query_parts = re.split(r'(\s+)' if isinstance(self.query, str) else b'(\s+)', self.query)
 
         parse_next = True