ui: Objective-C @interface support for Cocoa; minor clean-ups

examples/hot_reload/graph.v

@@ -42,7 +42,7 @@ fn (ctx &Context) draw() {
 	ctx.gg.draw_line(Size / 2, 0, Size / 2, Size) // y axis 
 	center := f64(Size / 2) 
 	for x := -10.0; x <= 10.0; x += 0.002 {
-		y := x * x + 1 
+		y := x * x - 1 
 		//y := (x + 3) * (x + 3) - 1
 		//y := math.sqrt(30.0 - x * x)
 		ctx.gg.draw_rect(center + x * Scale, center - y * Scale, 1, 1, gx.Black) 

examples/hot_reload/message.v

@@ -1,18 +1,18 @@
 // Build this example with
-// v -live message.v 
+// v -live message.v
 module main
 
 import time
 
-[live] 
+[live]
 fn print_message() {
-	println('Hello! Modify this message while the program is running.') 
+	println('Hello! Modify this message while the program is running.')
 }
 
 fn main() {
 	for {
 		print_message()
-		time.sleep_ms(500)  
+		time.sleep_ms(500)
 	}
 }