Improve ATL syntax

use the dedicated xycenter property
avoid setting the previous end-interpolation values before starting the new one, to avoid a jump if the player advances too quickly (also shortens the code)
add subpixel True, even though it doesn't seem very effective
prepare improvement in next renpy version

game/scripts/characters/luna/events/intro.rpy

@@ -71,24 +71,21 @@ label luna_intro_E1:
 
     $ luna.set_face(mouth="soft", eyes="closed", eyebrows="low", pupils="mid")
     show CG luna as cg zorder 17:
-        align (0.5, 0.5)
-        pos (-520, -300)
+        xycenter (-520, -300)
     with fade
 
     gen "Who is--"
     show CG luna as cg zorder 17:
-        align (0.5, 0.5)
-        pos (-520, -300)
+        subpixel True
         easein_quad 5.0 pos (-520, 150)
 
     gen "... A girl?"
     lun "*Mmh*"
 
     show CG luna as cg zorder 17:
+        subpixel True
         zoom 1.0
-        align (0.5, 0.5)
-        pos (-520, 150)
-        easein_quad 3.0 align (0.0, 0.0) pos (0, 0) zoom 0.5
+        easein_quad 3.0 align (.0, .0) pos (0, 0) zoom 0.5 # pos (0, 0) not necessary in next renpy version
 
     gen "What are you doing in my office?"
     gen "Did Snape send you here? Surely--"