Theorem: Nat.bit1_and_bit1 (Extra/Nat/Bitwise.lean)

State before:
x y : Nat
⊢ 2 * x + 1 &&& 2 * y + 1 = 2 * (x &&& y) + 1
Tactic:
simp [and_def, bit1_bitwise_bit1]
State after:
no goals