[mod] pretty url separation

searx/utils.py

         if k in d:
             result[k] = d[k]
     return result
+
+
+def prettify_url(url):
+    if len(url) > 74:
+        return u'{0}[...]{1}'.format(url[:35], url[-35:])
+    else:
+        return url

searx/webapp.py

 )
 from searx.utils import (
     UnicodeWriter, highlight_content, html_to_text, get_themes,
-    get_static_files, get_result_templates, gen_useragent, dict_subset
+    get_static_files, get_result_templates, gen_useragent, dict_subset,
+    prettify_url
 )
 from searx.version import VERSION_STRING
 from searx.languages import language_codes
             result['title'] = ' '.join(html_to_text(result['title'])
                                        .strip().split())
 
-        if len(result['url']) > 74:
-            url_parts = result['url'][:35], result['url'][-35:]
-            result['pretty_url'] = u'{0}[...]{1}'.format(*url_parts)
-        else:
-            result['pretty_url'] = result['url']
+        result['pretty_url'] = prettify_url(result['url'])
 
         # TODO, check if timezone is calculated right
         if 'publishedDate' in result: