loosen check pow 10 test

src/lib/implementation/LibDecimalFloatImplementation.sol

@@ -948,8 +948,8 @@ library LibDecimalFloatImplementation {
         }
     }
 
-    /// Sets the coefficient so that exponent is -37. Truncates the coefficient
-    /// if shrinking, will error on overflow when growing.
+    /// Sets the coefficient so that exponent is the target exponent. Truncates
+    /// the coefficient if shrinking, will error on overflow when growing.
     /// @param signedCoefficient The signed coefficient.
     /// @param exponent The exponent.
     /// @param targetExponent The target exponent.
@@ -1008,6 +1008,7 @@ library LibDecimalFloatImplementation {
         }
     }
 
+    /// First 4 digits of the mantissa and whether we need to interpolate.
     function mantissa4(int256 signedCoefficient, int256 exponent) internal pure returns (int256, bool, int256) {
         unchecked {
             if (exponent == -4) {

test/src/lib/implementation/LibDecimalFloatImplementation.pow10.t.sol

@@ -80,8 +80,8 @@ contract LibDecimalFloatImplementationPow10Test is LogTest {
     function boundFloat(int224 x, int32 exponent) internal pure returns (int224, int32) {
         exponent = int32(bound(exponent, -76, 76));
         Float a = LibDecimalFloat.packLossless(x, exponent);
-        vm.assume(a.gt(LibDecimalFloat.packLossless(-1e38, 0)));
-        vm.assume(a.lt(LibDecimalFloat.packLossless(type(int224).max, 0)));
+        vm.assume(a.gt(LibDecimalFloat.packLossless(type(int224).min, 9)));
+        vm.assume(a.lt(LibDecimalFloat.packLossless(type(int224).max, 9)));
         return (x, exponent);
     }