[Bf-cycles] Mapping node transformation order (intentional?)

[Campbell Barton]

Recently I noticed that the mapping node applies scale _after_ rotation.

This may seem like a detail however it means you can't aspect correct
an image that is rotated (to do so you need to you 2x Mapping nodes),
And for general usage it means you end up with diamond (sheared)
rectangles for tiled textures.

This is also different to object transformation (where you can scale
on a single axis even when the object is rotated.)

Is this by design or incidental?

-- 
- Campbell