Minor changes

Author: sunbreak1211

src/BeamState.sol

@@ -178,7 +178,7 @@ contract BeamState {
     }
 
     function setMaxChange(address rateLimits_, uint256 value) external roleAuth {
-        require(value == 0 || value >= WAD, "BeamState/maxChange-below-1x");
+        require(value == 0 || value >= WAD, "BeamState/invalid-maxChange");
         maxChange[rateLimits_] = value;
         emit SetMaxChange(rateLimits_, value);
     }

src/Configurator.sol

@@ -102,15 +102,17 @@ contract Configurator {
             uint256 maxChange = beamState.getMaxChange(rateLimits);
 
             // Ceiling is the max of (current * maxChange) and default
+            // Avoids overflow when current maxAmount is type(uint256).max and guarantees decreases are always possible even when maxChange is 0
             require(
                 maxAmount <= defMaxAmount ||
-                maxAmount <= current.maxAmount || // avoid overflow when current maxAmount is type(uint256).max
+                maxAmount <= current.maxAmount ||
                 maxAmount <= current.maxAmount * maxChange / WAD,
                 "Configurator/exceeds-max-amount"
             );
+            // Avoids overflow for a hypothetical case where current slope is type(uint256).max
             require(
                 slope <= defSlope ||
-                slope <= current.slope || // avoid overflow for an hypothetical case where current slope is type(uint256).max
+                slope <= current.slope ||
                 slope <= current.slope * maxChange / WAD,
                 "Configurator/exceeds-max-slope"
             );

test/BeamState.t.sol

@@ -325,8 +325,8 @@ contract BeamStateTest is DssTest {
         assertEq(beamState.maxChange(TARGET1), 0, "maxChange should be cleared");
     }
 
-    function testSetMaxChangeBelowWad() public {
-        vm.expectRevert("BeamState/maxChange-below-1x");
+    function testSetMaxChangeInvalidValue() public {
+        vm.expectRevert("BeamState/invalid-maxChange");
         beamState.setMaxChange(TARGET1, WAD - 1);
     }