style: fix flake8 E122 continuation indent in pinAirocon

Replace the unindented backslash line-continuations with a parenthesized
expression aligned to the opening bracket. Value is unchanged (verified
against the original formula). Keeps the CI flake8 lint job green.

Author: fulvius31

oneshot.py

@@ -336,13 +336,13 @@ def pinASUS(self, mac):
 
     def pinAirocon(self, mac):
         b = [int(i, 16) for i in mac.string.split(':')]
-        pin = ((b[0] + b[1]) % 10)\
-        + (((b[5] + b[0]) % 10) * 10)\
-        + (((b[4] + b[5]) % 10) * 100)\
-        + (((b[3] + b[4]) % 10) * 1000)\
-        + (((b[2] + b[3]) % 10) * 10000)\
-        + (((b[1] + b[2]) % 10) * 100000)\
-        + (((b[0] + b[1]) % 10) * 1000000)
+        pin = (((b[0] + b[1]) % 10)
+               + (((b[5] + b[0]) % 10) * 10)
+               + (((b[4] + b[5]) % 10) * 100)
+               + (((b[3] + b[4]) % 10) * 1000)
+               + (((b[2] + b[3]) % 10) * 10000)
+               + (((b[1] + b[2]) % 10) * 100000)
+               + (((b[0] + b[1]) % 10) * 1000000))
         return pin