message: Simplify this code using ok_or instead of ok_or_else.
diff: @@ -259,7 +259,7 @@ impl Memory for LinearMemory {
  let new_pages = mmap
  .size
  .checked_add(delta)
  - .ok_or_else(|| MemoryError::CouldNotGrow {
  + .ok_or(MemoryError::CouldNotGrow {
  current: mmap.size,
  attempted_delta: delta,
  })?;
  