[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>

searx/plugins/self_info.py

@@ -16,6 +16,7 @@ along with searx. If not, see < http://www.gnu.org/licenses/ >.
 '''
 from flask_babel import gettext
 import re
+
 name = gettext('Self Informations')
 description = gettext('Displays your IP if the query is "ip" and your user agent if the query contains "user agent".')
 default_on = True