[format.python] initial formatting of the python code

This patch was generated by black [1]::

    make format.python

[1] https://github.com/psf/black

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/searx/metrics/models.py b/searx/metrics/models.py
index 8936a51e3..d42569b7f 100644
--- a/searx/metrics/models.py
+++ b/searx/metrics/models.py
@@ -58,7 +58,7 @@ class Histogram:
 
     @property
     def quartile_percentage(self):
-        ''' Quartile in percentage '''
+        '''Quartile in percentage'''
         with self._lock:
             if self._count > 0:
                 return [int(q * 100 / self._count) for q in self._quartiles]