message: contracts-bedrock: more pr review
diff: @@ -165,6 +165,16 @@ const replaceImmutables = async (
  )
  }
  + // Ensure that the value being sliced out is 0
  + const val = hexDataSlice(
  + deployedBytecode,
  + offset.start,
  + offset.start + offset.length
  + )
  + if (!BigNumber.from(val).eq(0)) {
  + throw new Error(`Unexpected value in immutable bytecode ${val}`)
  + }
  +
  deployedBytecode = ethers.utils.hexConcat([
  hexDataSlice(deployedBytecode, 0, offset.start),
  hexZeroPad(value, 32),
  