style: auto-format example files with lux fmt

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

examples/showcase/pattern_matching.lux

@@ -1,16 +1,3 @@
-// Algebraic Data Types and Pattern Matching
-//
-// Lux has powerful ADTs with exhaustive pattern matching.
-// The type system ensures all cases are handled.
-//
-// Expected output:
-// Evaluating: (2 + 3)
-// Result: 5
-// Evaluating: ((1 + 2) * (3 + 4))
-// Result: 21
-// Evaluating: (10 - (2 * 3))
-// Result: 4
-
 type Expr =
     | Num(Int)
     | Add(Expr, Expr)
@@ -19,19 +6,19 @@ type Expr =
 
 fn eval(e: Expr): Int =
     match e {
-        Num(n) => n,
-        Add(a, b) => eval(a) + eval(b),
-        Sub(a, b) => eval(a) - eval(b),
-        Mul(a, b) => eval(a) * eval(b)
-    }
+    Num(n) => n,
+    Add(a, b) => eval(a) + eval(b),
+    Sub(a, b) => eval(a) - eval(b),
+    Mul(a, b) => eval(a) * eval(b),
+}
 
 fn showExpr(e: Expr): String =
     match e {
-        Num(n) => toString(n),
-        Add(a, b) => "(" + showExpr(a) + " + " + showExpr(b) + ")",
-        Sub(a, b) => "(" + showExpr(a) + " - " + showExpr(b) + ")",
-        Mul(a, b) => "(" + showExpr(a) + " * " + showExpr(b) + ")"
-    }
+    Num(n) => toString(n),
+    Add(a, b) => "(" + showExpr(a) + " + " + showExpr(b) + ")",
+    Sub(a, b) => "(" + showExpr(a) + " - " + showExpr(b) + ")",
+    Mul(a, b) => "(" + showExpr(a) + " * " + showExpr(b) + ")",
+}
 
 fn evalAndPrint(e: Expr): Unit with {Console} = {
     Console.print("Evaluating: " + showExpr(e))
@@ -39,15 +26,10 @@ fn evalAndPrint(e: Expr): Unit with {Console} = {
 }
 
 fn main(): Unit with {Console} = {
-    // (2 + 3)
     let e1 = Add(Num(2), Num(3))
     evalAndPrint(e1)
-
-    // ((1 + 2) * (3 + 4))
     let e2 = Mul(Add(Num(1), Num(2)), Add(Num(3), Num(4)))
     evalAndPrint(e2)
-
-    // (10 - (2 * 3))
     let e3 = Sub(Num(10), Mul(Num(2), Num(3)))
     evalAndPrint(e3)
 }