docs: natspec in interface

src/fixed-rate-irm/FixedRateIrm.sol

@@ -22,21 +22,14 @@ string constant RATE_ZERO = "rate zero";
 contract FixedRateIrm is IFixedRateIrm {
     using MarketParamsLib for MarketParams;
 
-    /* EVENTS */
-
-    /// @notice Emitted when a borrow rate is set.
-    event SetBorrowRate(Id indexed id, uint256 newBorrowRate);
-
     /* STORAGE */
 
-    /// @notice Borrow rates.
+    /// @inheritdoc IFixedRateIrm
     mapping(Id => uint256) public borrowRateStored;
 
     /* SETTER */
 
-    /// @notice Sets the borrow rate for a market.
-    /// @dev A rate can be set by anybody, but only once.
-    /// @dev `borrowRate` reverts on rate not set, so the rate needs to be set before the market creation.
+    /// @inheritdoc IFixedRateIrm
     function setBorrowRate(Id id, uint256 newBorrowRate) external {
         require(borrowRateStored[id] == 0, RATE_SET);
         require(newBorrowRate != 0, RATE_ZERO);

src/fixed-rate-irm/interfaces/IFixedRateIrm.sol

@@ -8,6 +8,18 @@ import {Id} from "../../../lib/morpho-blue/src/interfaces/IMorpho.sol";
 /// @author Morpho Labs
 /// @custom:contact [email protected]
 interface IFixedRateIrm is IIrm {
+    /* EVENTS */
+
+    /// @notice Emitted when a borrow rate is set.
+    event SetBorrowRate(Id indexed id, uint256 newBorrowRate);
+
+    /* EXTERNAL */
+
+    /// @notice Borrow rates.
     function borrowRateStored(Id id) external returns (uint256);
+
+    /// @notice Sets the borrow rate for a market.
+    /// @dev A rate can be set by anybody, but only once.
+    /// @dev `borrowRate` reverts on rate not set, so the rate needs to be set before the market creation.
     function setBorrowRate(Id id, uint256 newBorrowRate) external;
 }