[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

pitop/core/mixins/__init__.py

@@ -3,4 +3,4 @@
 from .stateful import Stateful
 from .digital_component_checks import DigitalComponentChecks
 from .supports_battery import SupportsBattery
-from .supports_miniscreen import SupportsMiniscreen
+from .supports_miniscreen import SupportsMiniscreen

pitop/core/mixins/digital_component_checks.py

@@ -1,8 +1,9 @@
 
 valid_digital_ports = ["D0", "D1", "D2", "D3", "D4", "D5", "D6", "D7"]
 
+
 class DigitalComponentChecks:
-    """Performs basic checks on validity of user-specified port"""
+    """Performs basic checks on validity of user-specified port."""
 
     def __init__(self, port_name):
         self.port_name = port_name

pitop/pma/ultrasonic_sensor.py

@@ -9,6 +9,7 @@
 valid_analog_ports = ["A1", "A3"]
 invalid_analog_ports = ["A0", "A2"]
 
+
 class UltrasonicSensor(Stateful, Recreatable):
     def __init__(self,
                  port_name,