message: Correct to_bgra docstring for DynamicImage
diff: @@ -158,7 +158,7 @@ impl DynamicImage {
  })
  }
  - /// Returns a copy of this image as an RGBA image.
  + /// Returns a copy of this image as an BGRA image.
  pub fn to_bgra(&self) -> BgraImage {
  dynamic_map!(*self, ref p -> {
  p.convert()
  