style: auto-format example files with lux fmt

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

examples/showcase/effect_composition.lux

@@ -1,16 +1,3 @@
-// Effect Composition - Combine multiple effects cleanly
-//
-// Unlike monad transformers (which have ordering issues),
-// effects can be freely combined without boilerplate.
-// Each handler handles its own effect, ignoring others.
-//
-// Expected output:
-// [LOG] Starting computation
-// Generated: 7
-// [LOG] Processing value
-// [LOG] Done
-// Result: 14
-
 effect Log {
     fn log(msg: String): Unit
 }
@@ -30,8 +17,8 @@ handler consoleLog: Log {
 
 fn main(): Unit with {Console} = {
     let result = run computation() with {
-        Log = consoleLog
-    }
+    Log = consoleLog,
+}
     Console.print("Generated: " + toString(result / 2))
     Console.print("Result: " + toString(result))
 }