Fixes mech equipment being unremovable (#39161)

And probably other issues with objects in objects moving out

code/game/atoms_movable.dm

@@ -152,18 +152,10 @@
 		direct = get_dir(src, newloc)
 	setDir(direct)
 
-	if(!loc.Exit(src))
+	if(!loc.Exit(src, newloc))
 		return
-	for(var/i in loc)
-		if(i == src)
-			continue
-		var/atom/movable/thing = i
-		if(!thing.Uncross(src, newloc))
-			if(thing.flags_1 & ON_BORDER_1)
-				Bump(thing)
-			return
 
-	if(!newloc.Enter(src))
+	if(!newloc.Enter(src, src.loc))
 		return
 
 	// Past this is the point of no return

code/game/turfs/turf.dm

@@ -149,7 +149,7 @@
 		firstbump = src
 	else
 		for(var/i in contents)
-			if(i == mover) // Multi tile objects
+			if(i == mover || i == mover.loc) // Multi tile objects and moving out of other objects
 				continue
 			var/atom/movable/thing = i
 			if(thing.Cross(mover))
@@ -161,6 +161,19 @@
 		return FALSE
 	return TRUE
 
+/turf/Exit(atom/movable/mover, atom/newloc)
+	. = ..()
+	if(!.)
+		return FALSE
+	for(var/i in contents)
+		if(i == mover)
+			continue
+		var/atom/movable/thing = i
+		if(!thing.Uncross(mover, newloc))
+			if(thing.flags_1 & ON_BORDER_1)
+				mover.Bump(thing)
+			return FALSE
+
 /turf/Entered(atom/movable/AM)
 	..()
 	if(explosion_level && AM.ex_check(explosion_id))