Fix code style

bootloader/crc_patch.py

@@ -3,21 +3,26 @@ import sys
 
 try:
     import crc16
+
     crcfun = crc16.crc16xmodem
 except ImportError:
     try:
         import crcmod
-        crcfun = crcmod.predefined.mkCrcFun('xmodem')
+
+        crcfun = crcmod.predefined.mkCrcFun("xmodem")
     except ImportError:
         try:
             import crcelk
+
             crcfun = crcelk.CRC_XMODEM.calc_bytes
         except ImportError:
-            raise Exception('Could not find a CRC implementation. Tried: crc16, crcmod, crcelk.')
+            raise Exception(
+                "Could not find a CRC implementation. Tried: crc16, crcmod, crcelk."
+            )
 
 
 def main():
-    data = open(sys.argv[1], 'rb').read()
+    data = open(sys.argv[1], "rb").read()
     crc = crcfun(data)
     # print(crc)
 
@@ -26,7 +31,7 @@ def main():
     crc = crcfun(padded)
     # print(crc)
 
-    open(sys.argv[1], 'wb').write(padded)
+    open(sys.argv[1], "wb").write(padded)
 
 
 if __name__ == "__main__":