Format all /test files with black

Signed-off-by: Christian König <ckoenig@posteo.de>

test/test_fedora_support.py

@@ -1,13 +1,15 @@
 def test_epel_and_remi_not_installed_fedora(host):
-    '''
+    """
     confirms installer does not attempt to install EPEL/REMI repositories
     on Fedora
-    '''
-    package_manager_detect = host.run('''
+    """
+    package_manager_detect = host.run(
+        """
     source /opt/pihole/basic-install.sh
     package_manager_detect
-    ''')
-    assert package_manager_detect.stdout == ''
+    """
+    )
+    assert package_manager_detect.stdout == ""
 
-    epel_package = host.package('epel-release')
+    epel_package = host.package("epel-release")
     assert not epel_package.is_installed