Updated MyModelArgs test case logic

demos/MyModelArgs.rb

@@ -11,10 +11,13 @@ class MyModel
   end
 
   def increment(n:, char:)
-    @x += n
-    schedule(:increment, 2.0 * rand(2), n: @x, char: char - 1, priority: 3)
-    printf "%f, %f, %c\n", model_time, @x, char
-    cancel_all :increment if model_time > 10
+    if model_time < 10.0
+      @x += n
+      schedule(:increment, rand(3), n: @x, char: char - 1, priority: 3)
+      printf "%f, %f, %c\n", model_time, @x, char
+    else
+      cancel_all :increment
+    end
   end
 end