message: Make error message more readable.
diff: @@ -83,7 +83,7 @@ StatusOr<std::unique_ptr<BufferAllocations>> BufferAllocations::Builder::Build(
  0) {
  return InternalError(
  "Address returned by memory_allocator->Allocate must be a "
  - "multiple of %x, but was %p",
  + "multiple of 0x%x, but was %p",
  kXlaAllocatedBufferAlignBytes, buffer.opaque());
  }
  // We do manual memory management within BufferAllocations. Be sure not
  