made hot reloader not skip lines with 'Ursina(' in them anymore. sinc…

…e Ursina is a singleton now, it should be safe to call it multiple times, since it returns the existing instance. this will also allow mor code to be reloadable, for example when instantiating Ursina insida a function.

ursina/prefabs/hot_reloader.py

@@ -21,7 +21,7 @@ def make_code_reload_safe(code):
     dedent_next = False
 
     for line in code.split('\n'):
-        if 'Ursina(' in line or line.strip().endswith('app.run()') or line.strip().endswith('HotReloader()'):
+        if line.strip().endswith('app.run()') or line.strip().endswith('HotReloader()'):
             continue
         if 'eternal=True' in line:
             continue