docs: add two comments

src/MetaMorpho.sol

@@ -888,17 +888,19 @@ contract MetaMorpho is ERC4626, ERC20Permit, Ownable2Step, Multicall, IMetaMorph
     /// @return newTotalAssets the new totalSupply.
     /// @return newLostAssets the new lostAssets.
     function _accruedSupplyAndAssets() internal view returns (uint256, uint256, uint256) {
+        // The assets that the vault has on Morpho.
         uint256 realTotalAssets;
         for (uint256 i; i < withdrawQueue.length; ++i) {
             realTotalAssets += MORPHO.expectedSupplyAssets(_marketParams(withdrawQueue[i]), address(this));
         }
 
         uint256 newLostAssets;
-        // Handle the case where the vault lost some assets.
+        // If the vault lost some assets (realTotalAssets decreased), lostAssets is increased.
         if (realTotalAssets < lastTotalAssets - lostAssets) newLostAssets = lastTotalAssets - realTotalAssets;
+        // If it did not, lostAssets stays the same.
         else newLostAssets = lostAssets;
-        uint256 newTotalAssets = realTotalAssets + newLostAssets;
 
+        uint256 newTotalAssets = realTotalAssets + newLostAssets;
         uint256 totalInterest = newTotalAssets.zeroFloorSub(lastTotalAssets);
         uint256 feeShares;
         if (totalInterest != 0 && fee != 0) {