doc: export function main in hello world example

This enables the example to be compiled and run as-is, without any
additional modification.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/il.txt b/doc/il.txt
index 928d16c..6d9345b 100644
--- a/doc/il.txt
+++ b/doc/il.txt
@@ -63,7 +63,7 @@ a # character and finish with the end of the line.
     # Define the string constant.
     data $str = { b "hello world", b 0 }
 
-    function w $main() {
+    export function w $main() {
     @start
             # Call the puts function with $str as argument.
             %r =w call $puts(l $str)