Add pre-commit

.pre-commit-config.yaml

@@ -15,3 +15,7 @@ repos:
           - id: poetry-lock
           - id: poetry-export
             args: ["-f", "requirements.txt", "-o", "requirements.txt"]
+    - repo: https://github.com/psf/black
+      rev: 23.1.0
+      hooks:
+          - id: black

src/projectorpi/serialdevice.py

@@ -12,7 +12,6 @@ class SerialDevice:
         self.prefix = ""
 
     def send_command(self, command: str) -> str:
-
         with Serial(self.serial_port, self.baudrate, timeout=3) as s:
             if self.verbose:
                 print(self.prefix, "send:", command)