add changeset

.changeset/cool-mangos-compare.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`Math`: add an `inv` function that inverse a number in Z/nZ

contracts/utils/math/Math.sol

@@ -219,7 +219,7 @@ library Math {
     }
 
     /**
-     * @notice Calculate the inverse of a in Z/nZ.
+     * @notice Calculate the inverse of a number in Z/nZ.
      *
      * If p is a prime, then we Z/nZ is a field commonly noted Fp. In that case all elements are inversible, expect 0.
      * If p is not a prime, then Z/nZ is not a field, and some elements might not be inversible.