Fix a code example sumExpr in macros.md

Author: ShapelessCat

docs/docs/reference/metaprogramming/macros.md

@@ -632,12 +632,12 @@ It is possible to deconstruct or extract values out of `Expr` using pattern matc
 
 `scala.quoted` contains objects that can help extracting values from `Expr`.
 
-* `scala.quoted.Expr`/`scala.quoted.Exprs`: matches an expression of a value (or list of values) and returns the value (or list of values).
-* `scala.quoted.Const`/`scala.quoted.Consts`: Same as `Expr`/`Exprs` but only works on primitive values.
-* `scala.quoted.Varargs`: matches an explicit sequence of expressions and returns them. These sequences are useful to get individual `Expr[T]` out of a varargs expression of type `Expr[Seq[T]]`.
-
+- `scala.quoted.Expr`/`scala.quoted.Exprs`: matches an expression of a value (or list of values) and returns the value (or list of values).
+- `scala.quoted.Const`/`scala.quoted.Consts`: Same as `Expr`/`Exprs` but only works on primitive values.
+- `scala.quoted.Varargs`: matches an explicit sequence of expressions and returns them. These sequences are useful to get individual `Expr[T]` out of a varargs expression of type `Expr[Seq[T]]`.
 
 These could be used in the following way to optimize any call to `sum` that has statically known values.
+
 ```scala
 inline def sum(inline args: Int*): Int = ${ sumExpr('args) }
 private def sumExpr(argsExpr: Expr[Seq[Int]])(using Quotes): Expr[Int] = argsExpr match {
@@ -646,7 +646,7 @@ private def sumExpr(argsExpr: Expr[Seq[Int]])(using Quotes): Expr[Int] = argsExp
     // argValues is of type Seq[Int]
     Expr(argValues.sum) // precompute result of sum
   case Varargs(argExprs) => // argExprs is of type Seq[Expr[Int]]
-    val staticSum: Int = argExprs.map(_.value.getOrElse(0))
+    val staticSum: Int = argExprs.map(_.value.getOrElse(0)).sum
     val dynamicSum: Seq[Expr[Int]] = argExprs.filter(_.value.isEmpty)
     dynamicSum.foldLeft(Expr(staticSum))((acc, arg) => '{ $acc + $arg })
   case _ =>