Copy info in Image.transform

[radarhere]

from PIL import Image
im = Image.open("Tests/images/hopper.gif")

print(im.rotate(180).info)  # {'version': b'GIF89a', 'background': 0, 'duration': 0, 'comment': b'File written by Adobe Photoshop\xa8 4.0'}
print(im.rotate(181).info)  # {}

This inconsistency is because for some angles, rotate will copy or transpose for the sake of efficiency

Pillow/src/PIL/Image.py

Lines 1924 to 1932 in 8c94f01

	if not (center or translate):
	if angle == 0:
	return self.copy()
	if angle == 180:
	return self.transpose(ROTATE_180)
	if angle == 90 and expand:
	return self.transpose(ROTATE_90)
	if angle == 270 and expand:
	return self.transpose(ROTATE_270)

instead of its usual transform.

Pillow/src/PIL/Image.py

Line 2001 in 8c94f01

return self.transform((w, h), AFFINE, matrix, resample, fillcolor=fillcolor)

transpose uses _new to create the new image, while transform uses new.

This PR resolves the inconsistent behaviour by ensuring that info is copied into transform images.