pep8: Fixes code style.

src/config.py

@@ -120,7 +120,9 @@ class Config(SQL):
                         f"INSERT INTO data VALUES ('close_correctly', 'True')")
 
                 if int(release) < 4:
-                    self.execute(f"INSERT INTO data VALUES ('last_solver_name', '')")
+                    self.execute(
+                        f"INSERT INTO data VALUES ('last_solver_name', '')"
+                    )
 
             self.commit()