Fix carrying_neg docstring

src/int/neg.rs

@@ -8,7 +8,7 @@ impl<const LIMBS: usize> Int<LIMBS> {
     /// Perform the two's complement "negate" operation on this [`Int`]:
     /// map `self` to `(self ^ 1111...1111) + 0000...0001` and return the carry.
     ///
-    /// Note: a zero carry indicates `self == Self::ZERO`.
+    /// Note: a non-zero carry indicates `self == Self::ZERO`.
     ///
     /// Warning: this operation is unsafe to use as negation; the negation is incorrect when
     /// `self == Self::MIN`.

src/uint/neg.rs

@@ -7,7 +7,7 @@ impl<const LIMBS: usize> Uint<LIMBS> {
     }
 
     /// Perform negation; additionally return the carry.
-    /// Note: the carry equals `Word::ZERO` when `self == Self::ZERO`, and `Word::MAX` otherwise.
+    /// Note: the carry equals `Word::MAX` when `self == Self::ZERO`, and `Word::ZERO` otherwise.
     pub const fn carrying_neg(&self) -> (Self, Word) {
         let mut ret = [Limb::ZERO; LIMBS];
         let mut carry = 1;