Clean up trailing whitespace in audio crossfade function

lib/audio.lua

@@ -40,7 +40,7 @@ end
 --- @param ms number? in milliseconds
 function audio:crossfade(from, to, ms)
     print("[Audio]: Triggered crossfade")
-    
+
     -- Stop previous 'from' if it's dangling to avoid leaks
     if self.from and self.from ~= from and self.from ~= to then
         self.from:stop()
@@ -54,7 +54,7 @@ function audio:crossfade(from, to, ms)
     -- Reuse fader object to allow task cancellation
     if not self.fader then self.fader = { value = 0 } end
     self.fader.value = 0
-    
+
     task.tween(self.fader, { value = 1 }, ms or 1000, ease.easeOutCubic)(function()
         if self.from then
             self.from:setVolume(0)