style: auto-format example files with lux fmt

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

examples/standard/stdlib_demo.lux

@@ -1,6 +1,3 @@
-// Standard Library Demo
-// Demonstrates the built-in modules: List, String, Option, Math
-
 fn main(): Unit with {Console} = {
     Console.print("=== List Operations ===")
     let nums = [1, 2, 3, 4, 5]
@@ -11,7 +8,6 @@ fn main(): Unit with {Console} = {
     Console.print("Length: " + toString(List.length(nums)))
     Console.print("Reversed: " + toString(List.reverse(nums)))
     Console.print("Range 1-5: " + toString(List.range(1, 6)))
-
     Console.print("")
     Console.print("=== String Operations ===")
     let text = "  Hello, World!  "
@@ -22,7 +18,6 @@ fn main(): Unit with {Console} = {
     Console.print("Contains 'World': " + toString(String.contains(text, "World")))
     Console.print("Split by comma: " + toString(String.split("a,b,c", ",")))
     Console.print("Join with dash: " + String.join(["x", "y", "z"], "-"))
-
     Console.print("")
     Console.print("=== Option Operations ===")
     let some_val = Some(42)
@@ -31,7 +26,6 @@ fn main(): Unit with {Console} = {
     Console.print("None mapped: " + toString(Option.map(none_val, fn(x: Int): Int => x * 2)))
     Console.print("Some(42) getOrElse(0): " + toString(Option.getOrElse(some_val, 0)))
     Console.print("None getOrElse(0): " + toString(Option.getOrElse(none_val, 0)))
-
     Console.print("")
     Console.print("=== Math Operations ===")
     Console.print("abs(-5): " + toString(Math.abs(-5)))