[mod] checker: minor adjustements on the default tests

the query "time" is convinient because most of the search engine will return some results,
but some engines in the general category will return documentation about the HTML tags <time> or <input type="time">

searx/search/processors/online.py

@@ -179,15 +179,15 @@ class OnlineProcessor(EngineProcessor):
                 requests_exception = True
             elif (issubclass(e.__class__, SearxEngineCaptchaException)):
                 result_container.add_unresponsive_engine(self.engine_name, 'CAPTCHA required')
-                logger.exception('engine {0} : CAPTCHA')
+                logger.exception('engine {0} : CAPTCHA'.format(self.engine_name))
                 suspended_time = e.suspended_time  # pylint: disable=no-member
             elif (issubclass(e.__class__, SearxEngineTooManyRequestsException)):
                 result_container.add_unresponsive_engine(self.engine_name, 'too many requests')
-                logger.exception('engine {0} : Too many requests')
+                logger.exception('engine {0} : Too many requests'.format(self.engine_name))
                 suspended_time = e.suspended_time  # pylint: disable=no-member
             elif (issubclass(e.__class__, SearxEngineAccessDeniedException)):
                 result_container.add_unresponsive_engine(self.engine_name, 'blocked')
-                logger.exception('engine {0} : Searx is blocked')
+                logger.exception('engine {0} : Searx is blocked'.format(self.engine_name))
                 suspended_time = e.suspended_time  # pylint: disable=no-member
             else:
                 result_container.add_unresponsive_engine(self.engine_name, 'unexpected crash')
@@ -216,22 +216,24 @@ class OnlineProcessor(EngineProcessor):
         tests = {}
 
         tests['simple'] = {
-            'matrix': {'query': ('time', 'time')},
+            'matrix': {'query': ('life', 'computer')},
             'result_container': ['not_empty'],
         }
 
         if getattr(self.engine, 'paging', False):
-            # [1, 2, 3] --> isinstance(l, (list, tuple)) ??
             tests['paging'] = {
                 'matrix': {'query': 'time',
                            'pageno': (1, 2, 3)},
                 'result_container': ['not_empty'],
                 'test': ['unique_results']
             }
+            if 'general' in self.engine.categories:
+                # avoid documentation about HTML tags (<time> and <input type="time">)
+                tests['paging']['matrix']['query'] = 'news'
 
         if getattr(self.engine, 'time_range', False):
             tests['time_range'] = {
-                'matrix': {'query': 'time',
+                'matrix': {'query': 'news',
                            'time_range': (None, 'day')},
                 'result_container': ['not_empty'],
                 'test': ['unique_results']